SAN BERNARDINO, Calif. – It didn't take ingenuity for Christopher Dorner to elude authorities for six days. He simply opened an unlocked door.

As law enforcement swarmed a mountain neighborhood searching for the fugitive ex-cop, Dorner hid in a condominium 100 feet across the street from a command post and a short distance where he left his burned-out truck.

On Friday, San Bernardino County investigators revealed Dorner died from an apparent self-inflicted gunshot wound to the head and defended tactics used during their search before a fiery gun battle ended an exhaustive manhunt.