We may not have the results of the toxicology report yet, but one thing from Michael Jackson's autopsy is certain.

Not only were needle marks found on the star, but they were located on his neck and arms, a source tells E! News. Investigators are hard at work trying to determine whether the marks were from IV needles used to administer the powerful sedative Diprivan.

Sister La Toya Jackson takes this news a step further, allegedly telling a British tab, "He had many needle marks on his neck and on his arms, and more about those will emerge in the next few weeks. But nothing has changed my mind that this was murder."

Given the media circus aroundM.J.'s death, it's surprising La Toya took three weeks to chime in. According to comments attributed to her in the News of the World article, she's taken one of the theories we've all heard—that people around the star didn't have his best interests at heart—and bumped it up to the conspiracy level. In the article, she continues to suggest her brother's death was an organized group murder and robbery.

E! News has not yet gotten independent confirmation about the contents of the interview.

Meanwhile, Dr. Conrad Murray, the cardiologist with Jackson at the time of his death, continues to maintain his innocence.

When E! News spoke with the doc's spokeswoman, Miranda Sevcik, on Friday, she claimed tales of police requesting additional documents were false.

"That's absolutely not true," she told E! News. "We gave everything that the investigators asked for on June 27th when we had that last long interview."

Although Murray issued a statement last Monday saying he never provided Jackson with any life-threatening drugs, Sevcik could not comment on Murray's knowledge of anyone else providing Jackson with medication, nor was she willing to comment on any specific medications.

"Our agreement was to not share any more details of the investigation, so we can't speak to the Diprivan," she said. "This was not our decision. This is what was requested of us by Los Angeles investigators. They thought if we talked about it, it would slow them down."