Last week, a man was killed in Brooklyn, New York when he attempted to roust what he believed to be a homeless man from his mother's front stoop. Turns out the homeless man was actually an undercover cop participating in an undercover drug transaction. Shem Walker was coming to pick his mother up to attend church when he found the homeless man on the stoop and requested that he leave. A scuffle ensued and ended when the undercover officer shot Mr. Walker twice. Full story here.