Since the untimely sudden death of music legend Michael Jackson made headlines a few weeks ago, many have speculated as to what may have killed the pop icon.

Several reports have surfaced stating Jackson had a long track record for abusing prescription drugs, including the addictive depressant Demoral. However, Jackson's older sibling LaToya Jackson presumes that he was murdered by a group of conspirators who were after his estate.

In a telling interview with British tabloid News of the World over the weekend, Jackson revealed that she knows who is responsible for the King of Pop's' death, in addition to his net worth making him a prime target.

"Michael was murdered," she declared. "And we don't think just one person was involved. Rather, it was a conspiracy of people. I feel it was all about money. Michael was worth well over a billion in music publishing assets and somebody killed him for that. He was worth more dead than alive."
Although the official coroner's report is not due for another two weeks, the former Playboy magazine cover girl, who was chosen by the family to sign her 50-year-old brother's death certificate, asserted "everyone will be surprised when the results come out."

"I can't discuss that any further because of the ongoing police investigation," she noted, adding "but I can say newspaper reports that there was methadone in his body are inaccurate."

"He had many needle marks on his neck and on his arms, and more about those will emerge in the next few weeks," she continued. "But nothing has changed my mind that this was murder and I won't give up until I find out what killed my brother."

The exclusive interview also revealed that she knew something "terrible" was going to happen to the 'Off The Wall' singer once he told her that various people were trying to "kill" him for his music catalogs and publishing. She added that people within his circle got him addicted to drugs and deliberately cut him off from family members.

"I can't say who I believe is responsible as I don't want to jeopardize the police investigation," Jackson said. "But not everybody had Michael's best interests at heart. A month ago I felt Michael was going to die before he did his London concerts. I felt it would be foul play. I felt he'd never make the show...He didn't want to do 50 shows, he only wanted to do 10. But he was pushed. And Michael being Michael didn't want to let down his fans."

"Michael was being controlled. No one could get through to him. We wanted to know why we were being kept away and my father Joe was always trying to get to see him. He tried so hard to be there for Michael. He was seen as a threat but he was trying to help. And if you keep the family away, you can conquer. It's like they say, divide and conquer."

Jackson went on to recall the moment in which she seen her brother alive three weeks prior to his death was at their parents 60th wedding anniversary in Beverly Hills. Describing the 'Thriller' singer as being happy and healthy.

"When I arrived Michael was there standing by the door greeting people, and he said to me, 'You look fabulous,'" she reminisced. "It was a wonderful time. When he left we embraced each other and he said, 'Thanks for a nice time. We have to do this again in Vegas.'... As he got into the vehicle he looked back and waved goodbye. It's sad to think that was the last time I saw my baby brother."

On July 14, the patriarch of the Jackson family, Joe Jackson, will appear in an exclusive interview with ABC News' Chris Connelly on a special titled 'Primetime: Family Secrets; The Jacksons After Michael.' During the interview, Jackson will discuss views on the death of his son including how he suspects foul play was involved.

'Primetime: Family Secrets; The Jacksons After Michael' airs at 10 PM/ET.