AGE Live, the concert producer of Michael Jackson's series of London concerts, insisted it has no liability over the death of the King of Pop. The company argued that the singer was responsible for his own death due to use of propofol.

Katherine Jackson filed a lawsuit against AEG over the death of her famous son and the trial, expected to last two to three months, started on Thursday. Mrs Jackson has offered to present as witness another singer, Prince, not Prince Jackson, the eldest son of the singer, who had already been questioned by the AEG lawyers.

Prince, known for his hit Purple Rain, and had apparently patterned his appearance after Michael Jackson, has actually never worked with the King of Pop, but Mrs Jackson believes his bad experience with AEG in the past could help them pin down the concert producer for Michael's death.

The singer's three children - Prince, 16, Paris, 15, and Blanket, 11 - are also expected to testify. They are among the 100 witnesses of Mrs Jackson who is seeking more than $40 billion damage from AEG. Of that total amount, the three scions are jointly seeking $10 billion damage for the future earnings of their father lost due to his early death.

Mrs Jackson said AEG, which organised her son's This Is It comeback concerts in London, was responsible for hiring Dr Conrad Murray as personal physician of Michael Jackson. The doctor was found guilty by a court of involuntary manslaughter over the singer's death for administering in June 2009 the fatal dose of propofol that ended Michael's life at 50.

AEG, for its defense, is reviving the child molestation case against the singer because of the events contribution to the increase in Michael's drug use, said AEG lawyer Marvin Putnam.

"Mr Jackson is a person who was known to doctor shop ... He was known to be someone who would tell one doctor one thing and another doctor something else," CNN quoted Mr Putnam, who is among those featured in a CNN documentary titled Michael Jackson: The Final Days. The docu will premiere on Friday, April 5 at 10 p.m.

AEG is apparently using the famous singer's eccentricities in its defense.

"We're talking about Michael Jackson. This is a man who would show up in pajamas. This is a man who would stop traffic and get out and dance on top of his car. This is a man who would go to public events with a monkey named Bubbles. This is a man who said he slept in an oxygen chamber," Mr Putnam added.