Garza was well-known to cops, having been arrested nearly 30 times in the past. He'd been committed to a state hospital in 2010 after a suicide attempt in which a rifle went off inside his grandparents' Laredo home, Baeza said. And just hours before the shooting, police interacted with Garza in downtown Laredo after an officer spotted him with another replica BB gun around 9 p.m. last Friday.