Indianapolis police have arrested a 16-year-old boy, charging him in connection with last weekend's downtown canal shootings that left five teens wounded. Sources say the Arlington High School student is a known gang member. The suspect, who lives on the northwest side, is charged with five counts of attempted murder and one count of criminal gang activity. The March 17 shootings happened between New York and Ohio streets at about 10 p.m. Two victims were critically injured. Earlier this week, the suspect's 17-year-old step brother was arrested on charges of gang activity and carrying a handgun.