A man says he killed a self-proclaimed vampire gigolo in Melbourne to “even the score” for an alleged rape.

Shane Chartres-Abbott, 28, was gunned down near his Reservoir home in June 2003, as he faced trial for allegedly raping a woman and biting off part of her tongue.

The woman’s ex-boyfriend Mark Adrian Perry, 46, and two other men, Warren Shea, 42, and Evangelos Goussis, 46, have all pleaded not guilty to his murder.

A fourth man, who cannot be named, says Shea approached him in 2003 and told him about the alleged rape and attack.

“It was in relation to evening the score,” the man told the Victorian Supreme Court on Wednesday.

“He weren’t too happy about it. The Warren that I knew was a man of honour and it went against his grain.

“I shot Chartres-Abbott as a result of that conversation.”

When asked by crown prosecutor Andrew Tinney SC why he had killed Mr Chartres-Abbott, the man replied: “For a favour.”

The man said he was given Mr Chartres-Abbott’s address by a police officer he knew as “Stash”.

The trial has previously heard the woman was a former client of Mr Chartres-Abbott when she was raped and mutilated in 2002.

Mr Chartres-Abbott told the woman he was a vampire who needed to drink blood to survive, and that he was “older than the city of Melbourne”.

The trial, before Justice Lex Lasry, continues.