Erin Burnett OutFront –

How are cops trained for deadly force?

Nearly two weeks since the shooting of unarmed black teen Michael Brown, many questions remain about what happened the day Brown was killed.

Officials say a shot was fired inside the officer's police car and Brown was found dead 35 feet from Wilson's police car.

Michael Brown autopsies: Will they answer the critical questions?

But how does that distance factor into a police officer's decision to shoot?

CNN's Kyung Lah is OutFront.