Casey Lawhorn

At 3 a.m. Chad raced to his car to drive to East Ridge, Tennessee, where his brother was living with their mother. He tried to call them during the two-hour drive, but Casey had turned off his cellphone, and his mother wasn't answering the nearly two dozen calls he made.

The 911 call came in early Sunday morning: He had shot two people and planned to kill himself, the caller told dispatchers. When police arrived at the address the caller had given - a single-family home in East Ridge, Tennessee, just outside of Chattanooga - they found a man and a woman dead from gunshot wounds. The caller was nowhere in sight.

At 3 a.m. Chad raced to his car to drive to East Ridge, Tennessee, where his brother was living with their mother. He tried to call them during the two-hour drive, but Casey had turned off his cellphone, and his mother wasn't answering the nearly two dozen calls he made.

The 911 call came in early Sunday morning: He had shot two people and planned to kill himself, the caller told dispatchers. When police arrived at the address the caller had given - a single-family home in East Ridge, Tennessee, just outside of Chattanooga - they found a man and a woman dead from gunshot wounds. The caller was nowhere in sight.