EAST RIDGE, Tenn. (AP) — Police in Tennessee are searching for a suspect in the fatal shootings of two people at a home.

East Ridge Assistant Police Chief Stan Allen tells the Chattanooga Times Free Press the Mississippi Highway Patrol found the vehicle of 23-year-old suspect Casey Lawhorn on Sunday.

A statement by the Jasper County Sheriff's Department says the car was found empty along Interstate 59 in Jasper County.

Allen says the bodies of Lawhorn's mother, Vi Lawhorn, and a friend were found with gunshot wounds to the head at a home in East Ridge along the Tennessee-Georgia border. Police have identified the second victim as 22-year-old Avery Gaines of Ringgold, Ga.

Allen says Casey Lawhorn notified authorities about the bodies before fleeing the state in a gold Ford Taurus.

According to the Facebook post from Sunday evening, Lawhorn, who in the post claims he is "almost 24," admitted to picking up a "stolen .22 LR rifle" from his bedroom and about 1:30 a.m., walked up to his friend dozing on the living room floor and "shot him in the head once."

The Facebook post said the young man "seemed to die instantly."

Then, the post suggests, he marched to his mother's dark bedroom while she was sleeping. The post claimed that his mom was inebriated when he tried pulling the trigger. But the gun jammed, according to the post.

The post stated he left the room momentarily to fix the weapon, and then returned. That's when he “rapidly got off two shots” in the dark.

The blood-curdling screams tested Lawhorn, according to the post.

“She started screaming the worst scream I've ever heard,” the post says. “Movies really don’t do justice to how true terror sounds.”

The gun jammed again, according to the post, and after fixing it a second time, Lawhorn then allegedly turned a light on and “shot at her twice more and it was over.”

The post said Lawhorn later swiped heroin and cash from his dead friend’s pockets and wallet but spared his mother’s dog and cat.

The post claims Lawhorn was planning to commit suicide.

“Surely any normal person would wish death on themselves after doing what I did, seeing what I saw, and hearing what I heard,” the post said.