LOS ANGELES — Michael Jackson's family wants a private autopsy of the pop icon because of unanswered questions about how he died and the doctor who was with him, the Rev. Jesse Jackson said Saturday.

"It's abnormal," he told The Associated Press from Chicago a day after visiting the Jackson family. "We don't know what happened. Was he injected and with what? All reasonable doubt should be addressed."

People close to Jackson have said since his death that they were concerned about the superstar's use of painkillers. Los Angeles County medical examiners completed an autopsy Friday and said Jackson had taken prescription medication.

Medical officials also said there was no indication of trauma or foul play. An official cause of death could take weeks.

The coroner's office released the body to Jackson's family Friday night. There was no immediate word on whether the second autopsy was being performed right away. Jesse Jackson described the family as grief-stricken.

"They're hurt because they lost a son. But the wound is now being kept open by the mystery and unanswered questions of the cause of death," he said.

Two days after Jackson died at a Los Angeles hospital, his most famous sister, Janet, arrived at the mansion Jackson had been renting. She drove up in a Bentley and left without addressing reporters.

Moving vans also showed up at the Jackson home, leaving about an hour later. There was no indication what they might have taken away.

There was also no word from the Jackson family on funeral plans. Many of Jackson's relatives have gathered at the family's Encino compound, caring there for Jackson's three children.