ROSEVILLE, Mich. – A Warren teenager is facing multiple charges after allegedly firing a handgun on accident at a Roseville home Saturday night, shooting another teen in the head. Donovan Anthony Harbus, 19, was charged Tuesday with carrying a concealed weapon, a five-year felony, and careless discharge of a firearm causing injury, a misdemeanor charge. At about 8:30 p.m. Saturday, a 17-year-old boy was shot in the head during a small gathering in the 17000 block of Ivanhoe Street. Police say Harbus and another individual were showing each other their illegal handguns when Harbus unintentionally discharged the weapon, striking the victim in the head. The 17-year-old boy was transported to the hospital where he was listed in critical condition.