Early Thursday in the Riverside County city of Corona, Dorner shot at two LAPD officers who had been dispatched to protect a possible target of Dorner, police said. One officer's head was grazed by a bullet; the other was unharmed.
Minutes later, Dorner used a rifle to ambush two Riverside officers, killing one and seriously wounding another, authorities said. The slain officer was identified as the 34-year-old Crain. The other officer's identity was not released to protect his family.