Photo: Paul Chinn, The Chronicle  Windows of new Hyundai sedans are smashed in Oakland, Calif. on Saturday, May 2, 2015 after a demonstration turned violent Friday night. More than 40 new cars parked in a dealership storage lot were heavily damaged or destroyed and windows were smashed at several businesses along the Broadway corridor.  Windows of new Hyundai sedans are smashed in Oakland, Calif. on...  Steve Tittel sweeps broken glass from inside the vacant GM Auto Mall showroom in Oakland, Calif. on Saturday, May 2, 2015 after a demonstration turned violent Friday night. More than 40 new cars parked in a dealership storage lot adjacent to the showroom were heavily damaged or destroyed and windows were smashed at several businesses along the Broadway corridor.  Steve Tittel sweeps broken glass from inside the vacant GM Auto...  Police Chief Sean Whent and Mayor Libby Schaaf react to overnight violence during a news conference at City Hall in Oakland, Calif. on Saturday, May 2, 2015 after a demonstration turned violent Friday night. More than 40 new cars parked in a dealership storage lot were heavily damaged or destroyed and windows were smashed at several businesses along the Broadway corridor.  Police Chief Sean Whent and Mayor Libby Schaaf react to overnight...  A burned-out Hyundai at a dealership on Broadway in Oakland. Vandals in a May Day march damaged dozens of cars at dealerships on Auto Row on May 1, 2015  A burned-out Hyundai at a dealership on Broadway in Oakland....  Shards of broken glass from a smashed rear window remain on the trunk of a new Hyundai sedan in Oakland, Calif. on Saturday, May 2, 2015 after a demonstration turned violent Friday night. More than 40 new cars parked in a dealership storage lot were heavily damaged or destroyed and windows were smashed at several businesses along the Broadway corridor.  Shards of broken glass from a smashed rear window remain on the...  Mayor Libby Schaaf comments on overnight violence during a news conference at City Hall in Oakland, Calif. on Saturday, May 2, 2015 after a demonstration turned violent Friday night. More than 40 new cars parked in a dealership storage lot were heavily damaged or destroyed and windows were smashed at several businesses along the Broadway corridor.  Mayor Libby Schaaf comments on overnight violence during a news...  A man runs past a boarded-up Chase bank branch at 14th and Broadway streets in Oakland, Calif. on Saturday, May 2, 2015 after a demonstration turned violent Friday night. More than 40 new cars parked in a dealership storage lot were heavily damaged or destroyed and windows were smashed at several businesses along the Broadway corridor.  A man runs past a boarded-up Chase bank branch at 14th and Broadway...  Samuel Gonzalez removes graffiti from a building on Broadway Street in Oakland, Calif. on Saturday, May 2, 2015 after a demonstration turned violent Friday night. More than 40 new cars parked in a dealership storage lot were heavily damaged or destroyed and windows were smashed at several businesses along the Broadway corridor.  Samuel Gonzalez removes graffiti from a building on Broadway Street...  Samuel Gonzalez removes graffiti from a building on Broadway Street in Oakland, Calif. on Saturday, May 2, 2015 after a demonstration turned violent Friday night. More than 40 new cars parked in a dealership storage lot were heavily damaged or destroyed and windows were smashed at several businesses along the Broadway corridor.  Samuel Gonzalez removes graffiti from a building on Broadway Street...  Windows of new Hyundai sedans are smashed in Oakland, Calif. on Saturday, May 2, 2015 after a demonstration turned violent Friday night. More than 40 new cars parked in a dealership storage lot were heavily damaged or destroyed and windows were smashed at several businesses along the Broadway corridor.  Windows of new Hyundai sedans are smashed in Oakland, Calif. on...  A charred Hyundai sedan is aired out in Oakland, Calif. on Saturday, May 2, 2015 after a demonstration turned violent Friday night. More than 40 new cars parked in a dealership storage lot were heavily damaged or destroyed and windows were smashed at several businesses along the Broadway corridor.  A charred Hyundai sedan is aired out in Oakland, Calif. on...  Police Chief Sean Whent and Mayor Libby Schaaf react to overnight violence during a news conference at City Hall in Oakland, Calif. on Saturday, May 2, 2015 after a demonstration turned violent Friday night. More than 40 new cars parked in a dealership storage lot were heavily damaged or destroyed and windows were smashed at several businesses along the Broadway corridor.  Police Chief Sean Whent and Mayor Libby Schaaf react to overnight...  Windows of new Hyundai sedans are broken in Oakland, Calif. on Saturday, May 2, 2015 after a demonstration turned violent Friday night. More than 40 new cars parked in a dealership storage lot were heavily damaged or destroyed and windows were smashed at several businesses along the Broadway corridor.  Windows of new Hyundai sedans are broken in Oakland, Calif. on...  A demonstrator jumps on a car at a dealership during a May Day protest in Oakland, California on May 1, 2015. Hundreds marched throughout the city vandalizing store fronts, smashing windows and lighting a car on fire before eventually dispersing. AFP PHOTO/JOSH EDELSONJosh Edelson/AFP/Getty Images  A demonstrator jumps on a car at a dealership during a May Day...  Smashed windows at a car dealership on Broadway at Hawthorne Avenue in Oakland. Vandals in a May Day march damaged dozens of cars at dealerships on Auto Row on May 1, 2015.  Smashed windows at a car dealership on Broadway at Hawthorne Avenue...  Protesters walk under highway overpass on Telegraph Ave in Oakland, Calif., Friday May 1, 2015.  Protesters walk under highway overpass on Telegraph Ave in Oakland,...  Masked vandal smashes Chase Bank window with a hammer on Broadway and 14th streets during the May Day protests in Oakland, Calif., Friday May 1, 2015.  Masked vandal smashes Chase Bank window with a hammer on Broadway...  Vandals tip over dumpster on Telegraph Ave during May Day protests in Oakland, Calif., Friday May 1, 2015.  Vandals tip over dumpster on Telegraph Ave during May Day protests...  A burning car is seen at a dealership during a May Day protest in Oakland, California on May 1, 2015. Hundreds marched throughout the city vandalizing store fronts, smashing windows and lighting a car on fire before eventually dispersing. AFP PHOTO/JOSH EDELSONJosh Edelson/AFP/Getty Images  A burning car is seen at a dealership during a May Day protest in...  Police arrest protesters during a May Day march in Oakland, Calif. on Friday, May 1, 2015.  Police arrest protesters during a May Day march in Oakland, Calif....  A demonstrator spray paints a wall during a May Day protest in Oakland, California on May 1, 2015. Hundreds marched throughout the city vandalizing store fronts, smashing windows and lighting a car on fire before eventually dispersing. AFP PHOTO/JOSH EDELSONJosh Edelson/AFP/Getty Images  A demonstrator spray paints a wall during a May Day protest in...  Workers clean up broken glass at KFC after it was smashed by vandals during a May Day protest in Oakland, Calif. on Friday, May 1, 2015.  Workers clean up broken glass at KFC after it was smashed by...  A motorcycle cop rides after protesters during a May Day protest in Oakland, Calif. on Friday, May 1, 2015.  A motorcycle cop rides after protesters during a May Day protest in...  Police corral protesters during a May Day protest in Oakland, Calif. on Friday, May 1, 2015.  Police corral protesters during a May Day protest in Oakland,...  Police storm people after they vandalized windows at a store during a May Day march in solidarity with Baltimore in Oakland, Calif. on Friday, May 1, 2015. Pictured in the green hat is a person representing the National Lawyers Guild.  Police storm people after they vandalized windows at a store during...  Police search a woman's bag after she was arrested during a May Day march in Oakland, Calif. on Friday, May 1, 2015.  Police search a woman's bag after she was arrested during a May Day...  People walk with shovels and other tools used to vandalize during a May Day march in solidarity with Baltimore in Oakland, Calif. on Friday, May 1, 2015.  People walk with shovels and other tools used to vandalize during a...  Police arrest protesters during a May Day march in Oakland, Calif. on Friday, May 1, 2015.  Police arrest protesters during a May Day march in Oakland, Calif....  Demonstrators (L) spray paint on a wall during a May Day protest in Oakland, California on May 1, 2015. Hundreds marched throughout the city vandalizing store fronts, smashing windows and lighting a car on fire before eventually dispersing. AFP PHOTO/JOSH EDELSONJosh Edelson/AFP/Getty Images  Demonstrators (L) spray paint on a wall during a May Day protest in...  A vandalized storefront is seen during a May Day protest in Oakland, California on May 1, 2015. Hundreds marched throughout the city vandalizing store fronts, smashing windows and lighting a car on fire before eventually dispersing. AFP PHOTO/JOSH EDELSONJosh Edelson/AFP/Getty Images  A vandalized storefront is seen during a May Day protest in...  Police run after protesters during a May Day protest in Oakland, Calif. on Friday, May 1, 2015.  Police run after protesters during a May Day protest in Oakland,...  A protester stands next to a burning car during a May Day march in solidarity with Baltimore in Oakland, Calif. on Friday, May 1, 2015.  A protester stands next to a burning car during a May Day march in...  Cops line up during the May Day protests in Oakland, Calif., Friday May 1, 2015.  Cops line up during the May Day protests in Oakland, Calif., Friday...  A sign seems to be hacked as protesters march for May Day in solidarity with Baltimore in Oakland, Calif. on Friday, May 1, 2015.  A sign seems to be hacked as protesters march for May Day in...  Vandals broke windows at KFC during a May Day march in solidarity with Baltimore in Oakland, Calif. on Friday, May 1, 2015.  Vandals broke windows at KFC during a May Day march in solidarity...  A security person eyes vandals after they broke windows in the street during a May Day march in solidarity with Baltimore in Oakland, Calif. on Friday, May 1, 2015.  A security person eyes vandals after they broke windows in the...  Workers clean up broken glass at KFC after it was smashed by vandals during a May Day protest in Oakland, Calif. on Friday, May 1, 2015.  Workers clean up broken glass at KFC after it was smashed by...  Workers look on from inside a vandalized KFC restaurant during a May Day protest in Oakland, California on May 1, 2015. Hundreds marched throughout the city vandalizing store fronts, smashing windows and lighting a car on fire before eventually dispersing. AFP PHOTO/JOSH EDELSONJosh Edelson/AFP/Getty Images  Workers look on from inside a vandalized KFC restaurant during a...  Protesters hold signs during May Day protests in Oakland, Calif., Friday May 1, 2015.  Protesters hold signs during May Day protests in Oakland, Calif.,...  Protesters march for May Day in solidarity with Baltimore in Oakland, Calif. on Friday, May 1, 2015.  Protesters march for May Day in solidarity with Baltimore in...  Police form a skirmish line during a May Day protest in Oakland, California on May 1, 2015. Hundreds marched throughout the city vandalizing store fronts, smashing windows and lighting a car on fire before eventually dispersing. AFP PHOTO/JOSH EDELSONJosh Edelson/AFP/Getty Images  Police form a skirmish line during a May Day protest in Oakland,...  Demonstrators break restaurant windows during a May Day protest in Oakland, California on May 1, 2015. Hundreds marched throughout the city vandalizing store fronts, smashing windows and lighting a car on fire before eventually dispersing. AFP PHOTO/JOSH EDELSONJosh Edelson/AFP/Getty Images  Demonstrators break restaurant windows during a May Day protest in...  A crowd of demonstrators march up a hill during a May Day protest in Oakland, California on May 1, 2015. Hundreds marched throughout the city vandalizing store fronts, smashing windows and lighting a car on fire before eventually dispersing. AFP PHOTO/JOSH EDELSONJosh Edelson/AFP/Getty Images  A crowd of demonstrators march up a hill during a May Day protest...  Vandals broke windows at KFC during a May Day march in solidarity with Baltimore in Oakland, Calif. on Friday, May 1, 2015.  Vandals broke windows at KFC during a May Day march in solidarity...  People overturned trash cans in the streets during a May Day march in solidarity with Baltimore in Oakland, Calif. on Friday, May 1, 2015.  People overturned trash cans in the streets during a May Day march...  Protesters gather during a May Day march in solidarity with Baltimore in Oakland, Calif. on Friday, May 1, 2015.  Protesters gather during a May Day march in solidarity with...  Protesters march during a May Day protest in Oakland, Calif. on Friday, May 1, 2015.  Protesters march during a May Day protest in Oakland, Calif. on...  Protesters face police during a march for May Day in Oakland, Calif. on Friday, May 1, 2015.  Protesters face police during a march for May Day in Oakland,...  Demonstrators show their support during a May Day protest in Oakland, California on May 1, 2015. Hundreds marched throughout the city vandalizing store fronts, smashing windows and lighting a car on fire before eventually dispersing. AFP PHOTO/JOSH EDELSONJosh Edelson/AFP/Getty Images  Demonstrators show their support during a May Day protest in...  Protesters march during a May Day protest in Oakland, Calif. on Friday, May 1, 2015.  Protesters march during a May Day protest in Oakland, Calif. on...  Protesters march during a May Day protest in Oakland, Calif. on Friday, May 1, 2015.  Protesters march during a May Day protest in Oakland, Calif. on...  Artist Teardrop speaks to protesters as they face police march during a May Day protest in Oakland, Calif. on Friday, May 1, 2015.  Artist Teardrop speaks to protesters as they face police march...  Protesters march during a May Day protest in Oakland, Calif. on Friday, May 1, 2015.  Protesters march during a May Day protest in Oakland, Calif. on...  Protesters gather before a May Day protest in Oakland, Calif. on Friday, May 1, 2015.  Protesters gather before a May Day protest in Oakland, Calif. on...  People take posters made by artist Jon Paul before a May Day protest in Oakland, Calif. on Friday, May 1, 2015.  People take posters made by artist Jon Paul before a May Day...  Longshoremen listen to speakers protesting police brutality during a united front rally at the entrance to berths 60-63 at the SSA Terminal in the Port of Oakland, Calif., Friday, May 1, 2015. (Laura A. Oda/Bay Area News Group via AP)  Longshoremen listen to speakers protesting police brutality during...  Mural artist Teardrop shows off his chalked hands after finishing a mural with the words "Black Lives Matter" in solidarity with Baltimore during a May Day rally at Frank H. Ogawa Plaza in Oakland, Calif. on Friday, May 1, 2015.  Mural artist Teardrop shows off his chalked hands after finishing a...  Demonstrators gather at Frank Ogawa Plaza during a May Day protest in Oakland, Calif. Friday, May 1, 2015  Demonstrators gather at Frank Ogawa Plaza during a May Day protest...  Members of the International Longshore and Warehouse Union Drill Team march up 14th Street toward Frank Ogawa Plaza during a May Day protest in Oakland, Calif. Friday, May 1, 2015  Members of the International Longshore and Warehouse Union Drill...  Demonstrators show their support during a May Day protest in Oakland, California on May 1, 2015. Hundreds marched throughout the city vandalizing store fronts, smashing windows and lighting a car on fire before eventually dispersing. AFP PHOTO/JOSH EDELSONJosh Edelson/AFP/Getty Images  Demonstrators show their support during a May Day protest in...  Demonstrators hold up signs with photos of people who were victim to alleged police brutality outside the Port of Oakland and attempt to shut it down during a May Day protest in Oakland, Calif. Friday, May 1, 2015  Demonstrators hold up signs with photos of people who were victim...  Webb Mealy paints the iconic Oakland tree behind a stencil that reads "Black Lives Matter Oakland Baltimore" in Frank Ogawa Plaza during a May Day protest in Oakland, Calif. Friday, May 1, 2015  Webb Mealy paints the iconic Oakland tree behind a stencil that...  A man hangs banners in Frank Ogawa Plaza during a May Day protest in Oakland, Calif. Friday, May 1, 2015  A man hangs banners in Frank Ogawa Plaza during a May Day protest...  Demonstrators begin to gather at Frank Ogawa Plaza during a May Day protest in Oakland, Calif. Friday, May 1, 2015  Demonstrators begin to gather at Frank Ogawa Plaza during a May Day...  A demonstrator by the name of T.J. holds a sign that reads "Go Home" during a morning protest organized to block tech commuter buses outside MacArthur BART station in Oakland, Calif. Friday, May 1, 2015.  A demonstrator by the name of T.J. holds a sign that reads "Go...  A man holds a sign during a protest organized to block tech commuter buses outside MacArthur BART station in Oakland, Calif. Friday, May 1, 2015.  A man holds a sign during a protest organized to block tech...  Carl Dix of Revolution Club Bay Area speaks to the crowd at Frank Ogawa Plaza during a May Day protest in Oakland, Calif. Friday, May 1, 2015  Carl Dix of Revolution Club Bay Area speaks to the crowd at Frank...  Oakland Public Library employee Nina Lindsay holds a sign while listening to speakers at Frank Ogawa Plaza during a May Day protest in Oakland, Calif. Friday, May 1, 2015  Oakland Public Library employee Nina Lindsay holds a sign while...  Demonstrators chant while marching up 14th Street toward Frank Ogawa Plaza during a May Day protest in Oakland, Calif. Friday, May 1, 2015  Demonstrators chant while marching up 14th Street toward Frank...  Demonstrators hold up a banner during a protest organized to block tech commuter buses outside MacArthur BART station in Oakland, Calif. Friday, May 1, 2015.  Demonstrators hold up a banner during a protest organized to block...  Demonstrators hold up signs during a protest organized to block tech commuter buses outside MacArthur BART station in Oakland, Calif. Friday, May 1, 2015.  Demonstrators hold up signs during a protest organized to block...  Demonstrators gather outside the Port of Oakland and attempt to shut it down during a May Day protest in Oakland, Calif. Friday, May 1, 2015  Demonstrators gather outside the Port of Oakland and attempt to...  Eugene Moore wears a shirt of his son Jeremiah Moore, who was killed by police in Vallejo at 29, while he waits for the restroom at The Rotisserie Deli during a May Day rally at Frank H. Ogawa Plaza in Oakland, Calif. on Friday, May 1, 2015. Moore is also a Longshoreman marched with protesters earlier from the Port of Oakland.  Eugene Moore wears a shirt of his son Jeremiah Moore, who was...
Business owners along Oakland’s Auto Row cleaned up and took stock Saturday after vandals rampaged through the area, shattering store windows and smashing car windshields in a May Day protest whose ferocity took police by surprise.  Oakland police did not call for backup help until 8:44 p.m. Friday, spokeswoman Johnna Watson confirmed — some 15 minutes after vandals in a crowd of several hundred people had begun breaking glass.  [...] it was too late for enough officers from other law enforcement agencies to get there and prevent the damage.  Hundreds of demonstrators marched through downtown Oakland, causing mayhem and damaging scores of autos in car lots on Broadway, including more than 50 vehicles at a Hyundai dealership.  Whent acknowledged Saturday that the crowd was larger and “angrier than we expected,” and that the timing of the call for help from outside agencies — after the vandalism had begun — “minimized the effectiveness of our mutual-aid response.”  The vandals were among a large number of people who set off from City Hall on a march through downtown Oakland at 6:30 p.m. to protest police brutality.  Protesters shouted, “Baltimore, we got your back!” — a reference to the death of a Baltimore man fatally injured in police custody and the announcement Friday that Maryland’s state prosecutor would charge six police officers in connection with the death.  Only afterward, when police put out the call for aid from surrounding agencies, did dozens of police in riot gear show up to try to contain the protesters.  Along Broadway, where several shops and a building under construction had been hit during the pandemonium, some were already boarded up.  On Broadway near 30th Street, 66-year-old Bruce Burrows looked at the eight broken windows in a vacant building that used to house a car dealership.  The mayor described those involved in the unrest as “cowardly people that use the cloak of night and large crowds to commit this type of vandalism.”  Whent, who was also at the news conference, said police had arrested about a dozen people on suspicion of a variety of crimes, including burglary, vandalism and failure to disperse after officers declared an unlawful assembly.