Michael Jackson was murdered for his 1-billion-pound fortune, accordingto his heartbroken sister La Toya.

In an exclusive interview, the former Playboy model, 53, said that she and thefamily are convinced her brother''s apparent drugs overdose was "foulplay" by a shadowy group out to get their hands on his 1-billion-poundfortune.

“We don't think just one person was involved in the murder. It was a conspiracyto get Michael''s money," News of the World quoted her as saying. La Toya,the closest person to Michael from the whole tight-knit Jackson clan, said thatshe has vowed revenge on the people she claims murdered her brother Michael.

"I know who did it and I won''t rest until I nail them," she added.

La Toya added: "Michael was murdered. And we don''t think just one personwas involved. Rather, it was a conspiracy of people. I feel it was all aboutmoney. Michael was worth well over a billion in music publishing assets andsomebody killed him for that. He was worth more dead than alive."

La Toya''s revelations come just two days after the chief of Los Angeles policeadmitted they were investigating the singer’s death as possible homicide.