FILE - In this June 23, 2009 handout photo provided by AEG, 

FILE - In this June 23, 2009 handout photo provided by AEG, pop star Michael Jackson rehearses at the Staples Center in Los Angeles. A sleep expert, Charles Czeisler, told jurors Friday, June 21, 2013, that Jackson exhibited symptoms of someone who was totally sleep deprived when he died in June 2009. Czeisler is a Harvard researcher testifying for Jackson’s mother in a negligent hiring lawsuit against concert promoter AEG Live LLC. (AP Photo/ Kevin Mazur, AEG/Getty Images, File) ** NO SALES, ARCHIVE OUT. MANDATORY CREDIT **
Associated Press
FILE - In this June 23, 2009 handout photo provided by AEG, pop star Michael Jackson rehearses at the Staples Center in Los Angeles. A sleep expert, Charles Czeisler, told jurors Friday, June 21, 2013, that Jackson exhibited symptoms of someone who was totally sleep deprived when he died in June 2009. Czeisler is a Harvard researcher testifying for Jackson’s mother in a negligent hiring lawsuit against concert promoter AEG Live LLC. (AP Photo/ Kevin Mazur, AEG/Getty Images, File) ** NO SALES, ARCHIVE OUT. MANDATORY CREDIT **
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