A thug who kicked a homeless man to death and scrawled obscenities on his body has been jailed for life.

Dean Forde, 22, rained down blows and stamped on the head of Paul Doohan, 41, splattering a derelict school with his blood.

As the victim lay there with massive head injuries, the killer stripped him naked and urinated on his body.

He scrawled the words 'mug', 'remember' and 'you c***' on his body.

Forde tossed Mr Doohan's clothes out of the window and emptied a dustbin on him.

The defendant, his girlfriend Suzanne Jimenez, 33, and the victim were part of a group of drinkers who were using the boarded-up Wimbledon House School in Dorset Road, Wimbledon as a squat.

On the night of November 20, 2006, Forde argued with Mr Doohan at Wimbledon station and the pair were later seen fighting in the street.

They went to the squat where Forde attacked Mr Doohan again because he thought the victim had insulted him.

Mr Doohan suffered 54 separate blows to the head and chest in the attack, resulting in a ten broken ribs and a fractured larynx.

Forde and Jimenez went back to her flat, and other squatters called an ambulance the following morning, but Mr Doohan was already dead.

Jimenez provided an alibi for her boyfriend and insisted to police she had only left her flat in Durham Road, Raynes Park, that night to charge her electricity key.

But her fingerprint was discovered at the scene and the victim's blood was found on her boots.

She was cleared of murder but jailed for two years for perverting the course of justice.

Jailing Forde for life, Judge Peter Thornton, QC, told the killer: "Even though Mr Doohan was a drinker and at times, something of a down-and-out, you have taken the life of a man who had friends and parents who loved him dearly.

"This was an extremely brutal attack. His blood was splashed and splattered in all directions. You killed him with contemptuous violence."

The judge ordered that Forde serve a minimum of 14 years, minus the 448 days he has served on remand.

Forde, of no fixed address and Jimenez, denied murder.