1: Bates said he meant to use his stun gun but ended up firing his handgun instead . 2: In a well-publicized 2009 case , a Bay Area Rapid Transit police officer fired his gun instead of his Taser , killing 22-year-old Oscar Grant in Oakland , California . 3: In 2009 , an officer in California also said he mistakenly used his gun instead of a Taser .
1: Bates 2: a Bay Area Rapid Transit police officer 3: an officer in California