Officer shot in Thousand Oaks mass shooting was killed by friendly fire

Though he was also shot by the suspect in last month's attack at the Borderline Bar & Grill in Thousand Oaks, Ca., Sgt. Ron Helu was killed by friendly fire during the shootout.

"We believe that Sgt. Helus was clearly not the intended target of the CHP officer -- which further illustrates the extreme situation both men faced."

According to the county's chief medical examiner, Helus' initial wounds were survivable, but the sixth bullet proved deadly when it struck his heart.

Previously.