Blue Bloods - Season 2 Episode 18 -

Frank finds himself working with the Mayor and Reverend Potter from a previous episode, in a program to buy guns which may have been used in a crime but will not be used against them. But when a gun which was believed to have been used in a robbery wherein someone got shot, is turned in the officer who got it takes a photo of the one who turned it in and gives it to Danny. But Danny tries not to use it. But when he hits a road block; when the man who was shot was trying to describe the shooter to a sketch artist, Danny tries to lean him towards the man in the photo ...