Can I Get a Witness?

S14 E16: A young black male is shot point blank at a park in Harlem. The only thing the witnesses nearby can say, is the shooter, who rode a bicycle, had a weird eye. It takes awhile, but Briscoe and Green find the shooter, Foster Keyes, through the eye center since he had a glass eye. When they go to his apartment, they find his cousin Ronald, a.k.a. "Slug," is not very helpful. But with all his tattoos, it's obvious he's a prison veteran. The Detectives manage to locate Keyes at his girlfriend's place in the projects, bring him in and the girl who was the original witness from the park, Shayna, picks him out of a lineup.