A KILLER son had sex with his 89-year-old mother's corpse after he battered her so hard her brain was missing, police said.

Lindsey Turiano, 58, is said to have beat Norma with a walking stick in San Antonio, Texas.

5 Lindsey Turiano, 58, has been charged with his mum's murder in San Antonio, Texas Credit: MYDRIM JONES

5 Norma, 89, was unrecognisable when police found her decomposing body Credit: MYDRIM JONES

A police report said: "The victim's head was completely obliterated to the point that she was unrecognisable as a person."

Turiano admitted to strangling the OAP in her bedroom before stripping her naked and trying to rape her, according to his arrest warrant affidavit.

He reportedly told detectives he dragged her into the living room while she was kicking and screaming and hit her over the head with a stick until she was dead.

The police documents added: "Once dead the defendant dragged the victim into the back room and again engaged in sexual acts with the deceased victim."

Cops were called to the home on July 14 to investigate reports of a burglary, according to his affadavit.

Police noticed broken windows and a foul odour coming from the home so they broke down the front door to get inside.

'UNRECOGNISABLE'

They found Turiano dehydrated and unable to speak in the kitchen, the documents add.

Norma, who was originally from the Philippines, was found in a decomposed state and unrecognisable in a back room.

Police said they found dried blood splatter on the living room walls and ceiling and the floor was covered with broken furniture, glass and other household items.

Investigators said they recovered a broken knife with what appeared to be human tissue with teeth attached.

They also said they found skull fragments and black stains on the carpet.

Norma's autopsy was performed at the Bexar County Medical Examiner's Office.

Her body had multiple blunt force trauma, multiple stab wounds to her chest, neck and lower left leg.

Detectives added her upper jaw and upper left arm were fractured and she had multiple puncture wounds to the back of her left arm.

Once dead the defendant dragged the victim into the back room and again engaged in sexual acts with the deceased victim Police documents

Turiano was taken to Southwest General Hospital and didn't speak to officers right away.

He confessed to killing his mum to a doctor while he was being seen in the psychiatric unit of Downtown Baptist Hospital almost six weeks later after the body was found, according to the affadavit.

Turiano was charged with murder on Wednesday.

Police spokesman Jennifer Rodriguez said: “Since the very beginning, detectives had been wanting to talk to Mr. Turiano but he had been hospitalised after this incident occurred.”

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Cheryl Black, a next-door neighbour, said: “I knew he had some troubles I wasn't exactly sure what they were.

She had known Norma since she was young.

Cheryl added: "She's been there my whole life. I'm used to her being there. It’s a hard pill to swallow.”

5 Turiano reportedly confessed to killing his mum Credit: MYDRIM JONES

5 Norma's brain was missing from her head when her body was found, according to police Credit: MYDRIM JONES

5 Turiano was in the home when police found the body Credit: MYDRIM JONES

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