>> reporter: five days after a 12-year-old with a gun allegedly killed a teacher and wounded two students at a middle school in nevada, one of the students is speaking out about the experience and the man who helped him. joe fryer has the story.  >> reporter: for shooting survivor mason --  >> i heard a gunshot. then another one.  >> reporter: what makes monday's tragedy at sparks middle school harder to deal with is he considered the gunman a friend.  >> i knew i wasn't being targeted. i never did anything to him.  >> reporter: mason, a 7th grader whose family asked us not to use his last name, was standing outside the building when he heard gunshots.  >> and that's when i saw michael lansbury on the ground.  >> reporter: michael ran to help the heroic math teacher and came face to face with the shooter identified as 12-year-old jose reyes .  >> i'm like, please don't shoot me. you need to get in the building. please don't shoot me. he raised the gun and shot me.  >> reporter: though he was hit in the stomach, mason ran away from the shooter and met security guard lou ber kbrksgarelo.  >> he was the first one to me. i said, i'm shot.  >> he was good. he kept talking to me. god bless him. good kid. polite kid.  >> reporter: he made sure mason was quickly treated. mason is now mourning the loss of michael lansbury, someone he considered a friend.  >> he was a really nice guy. i wish he could be here today.  >> reporter: as for the shooter, some classmates said reyes was bullied but mason saw it differently.  >> if he was bullied i would have stuck up for him.  >> reporter: after a traumatic week on mason's first full day out of the hospital, he knew who he wanted to see. lou burgarelo. a surprise thank you for the security guard who helped protect mason's life.  >> god bless you. take care of yourself.  >> reporter: joe friar, nbc news, sparks, nevada.
Video on msnbc.com: NBC’s Joe Fryer speaks with Sparks Middle School student Mason, who recalls being shot in the stomach by the gunman who killed Nevada teacher Michael Landsberry — a fellow classmate and friend.