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In his interview with police, the doctor "helped identify the circumstances around the death of the pop icon and clarified some inconsistencies," Murray's spokeswoman Miranda Sevcik said in a statement Saturday. "Investigators say the doctor is in no way a suspect and remains a witness to this tragedy."
The statement said Murray has been in Los Angeles since Jackson's death, and plans to stay here until his cooperation is no longer needed.
Police confirmed that they interviewed Murray, adding that he was cooperative and "provided information which will aid the investigation." The LAPD has said Murray is not a suspect.
. The family has already had a second, private autopsy performed on Jackson's body to determine the cause of death, according to the LA Times.
"It's abnormal," Jesse Jackson said 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 his use of painkillers. Los Angeles County medical examiners completed their 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.
L. Londell McMillan, who represented Jackson last year in a breach of contact lawsuit and has advised high-profile clients such as Prince, was picked to help the family by Katherine Jackson, the singer's mother, said a person who requested anonymity because the matter is private.
There was no word from the Jackson family on funeral plans. Fans have called for a public memorial to commemorate the pop superstar.
Many of Jackson's relatives have gathered at the family's Encino compound, caring there for Jackson's three children.
It remains unclear who Jackson designated as potential guardians for his children. Those details - likely contained in the 50-year-old singer's will - have not been released.
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An attorney for Deborah Rowe, the mother of Jackson's two oldest children, issued a statement Saturday asking that the Jackson family "be able to say goodbye to their loved one in peace."
Sisters Janet and La Toya arrived Saturday at the mansion Jackson had been renting 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.
The Jackson family issued a statement Saturday expressing its grief over the death and thanking his supporters.
"In one of the darkest moments of our lives we find it hard to find the words appropriate to this sudden tragedy we all had to encounter," said the statement made through People magazine. "We miss Michael endlessly."
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.
President Barack Obama has penned a private letter to the Jackson family expressing his condolences, senior White House adviser David Axelrod said Sunday on NBC's "Meet the Press."
Obama did not issue a statement following Jackson's death, but the White House has said the president saw the pop star as a spectacular performer whose life had sad and tragic aspects.
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Michael Jackson was perhaps the most exciting performer of his generation. At the height of his fame, he was a towering figure in entertainment.
As a young boy, he entertained TV audiences with his brothers as part of the Jackson 5. When he left the group, he embarked on what would become one of the greatest solo careers in music history.
He had four No. 1 singles with his album "Off the Wall," and then came "Thriller."
In 1982, "Thriller" became the best-selling album of all time. It was No. 1 on the charts for 37 weeks, selling 50 million copies worldwide and producing seven hit singles.
The "moonwalk," the glove and that voice, Jackson hit big again in 1987 with the release of his album "Bad."
But at his lowest point, his career was marred by lurid allegations and financial troubles. Jackson reportedly died with about $400 million of debt.
His legal troubles began in 1993 when he was accused of molesting a little boy.
"Don't treat me like a criminal, because I am innocent," Jackson said December 1993.
Jackson was able to settle the case before it went to trial, and in 2005, he was cleared of another molestation charge.
Jackson's personal life also became tabloid headlines. He had a failed marriage to Lisa Marie Presley, and then another one to Debbie Rowe, the mother of two of his three children. He altered his appearance over time, dangled one of his children off a hotel balcony and lost Neverland Ranch over money problems.
Jackson's life was cut short just as he was about to attempt one of the greatest comebacks of all time.
Emotional Jackson fans consoled each other at the Hollywood Walk of Fame on Friday. For most, Jackson's death was a complete shock.
"I just can't believe it," said fan Suzette Jones.
"I grew up with Michael Jackson from the '70s, so it's not like I just came on this thing. All my life, I've known Michael Jackson," Jones said as she sobbed.
Press from around the world descended on Jackson's star, and at one point, the memorial was overrun by crews and their equipment.
Fans also flocked to the Jackson family home in Encino.
Lynn Perez said she was looking forward to seeing Jackson in concert for the first time on August 12.
"I wanted to wake up, and somebody tell me this isn't real," Perez said. "He didn't judge anybody. He loved everybody. He wanted world peace. He cared about children. He cared about hunger and the world."
Meanwhile, a candlelight vigil to remember Jackson's life and legacy is planned for Sunday at the original home of Motown Records in Detroit.
The Motown Historical Museum says the vigil at the Hitsville USA building will begin at 8 p.m. EDT Sunday. The historic building was the launching pad for Jackson's career. Hitsville includes Studio A, the studio where Jackson recorded as a member of The Jackson 5.