The gun-toting thug charged with killing a 7-month-old Brooklyn girl in a stray-bullet horror hobbled into court on crutches Wednesday to face murder charges in the senseless slaying. Amuri Greene, 21, who was injured in a moped wreck while allegedly fleeing the scene of the April 1st shooting, was arraigned on a 17-count murder indictment in Brooklyn Supreme Court, one day after his accused accomplice was charged in the crime.