What should I do if a stranger is following me in a dark alley?
user
If you find yourself in a dark alley and a stranger is following behind you, it is best to: 
-Stay calm and don't make any sudden movements 
-Look behind you and assess the situation. Note the direction they are coming from, how many people are following, and what access they have to escape routes
-If possible, cross the alley or quickly double back until you can find safety at a public location with multiple people
-If escaping isn't possible or if there's an imminent danger call 911 immediately. Be sure to note down the details of when and where you are located. Provide police with as much detail about your attacker as possible.
assistant
What should I do if a stranger is following me in a dark alley?
user
If a stranger is following you in a dark alley, the safest thing to do is to immediately turn around and find an alternate route. Make as much noise as possible in order to alert people nearby that you are being followed and consider drawing attention to yourself with your cell phone or other items.
assistant
What should I do if a stranger is following me in a dark alley?