Katharine Jackson is suing concert promoters AEG Live for the wrongful death of her son. She claims in the suit that AEG Live was negligent in hiring Dr. Conrad Murray to look after Michael Jackson ahead of a planned London comeback concert series in 2009.
AEG argues that Jackson had a history of drug abuse long before he was treated by Murray.
The so-called King of Pop died in June 2009 in Los Angeles. A court found Murray guilty of involuntary manslaughter in 2011 for giving Jackson an overdose of the drug propofol to help him sleep.
Michael Jackson was a leader in the music industry, known for his unique singing, producing and choreography. His album Thriller, released in 1982, remains the best-selling album of all time.
Some information for this report was provided by AFP and Reuters.