The mother of a 12-year-old boy shot by a Cleveland policeman says she wants him convicted for killing her son, who was carrying a pellet gun that police say looked real. Tamir Rice was confronted Nov. 22 when officers responded to a 911 call about someone with a gun near a playground. Surveillance video shows him being shot within 2 seconds of a patrol car stopping nearby. Samaria Rice said at a news conference Monday that a friend gave her son the airsoft gun, which shot nonlethal plastic pellets. The family's new attorneys say they want a transparent investigation. A grand jury will consider whether charges are merited. Other attorneys have filed a wrongful death lawsuit against the city on behalf of Tamir's family. The city isn't commenting on the lawsuit.