Katherine Jackson seeks new trial against concert promoter AEG Live over her son Michael's death after losing $40 billion case in October

New trial: Katherine Jackson, shown in June in Las Vegas, has filed court documents seeking a new trial against concert promoters AEG Live after losing her wrongful death lawsuit in October

Katherine Jackson is seeking a new trial after losing her $40 billion wrongful death lawsuit against concert promoter AEG Live over the death of her pop superstar son Michael.

The 83-year-old matriarch filed court documents at Los Angeles County Superior Court on Monday, asking for another chance to convince a jury that AEG should be found liable.

A Los Angeles jury in October cleared AEG Live of negligence in the singer's 2009 death following a lengthy trial.

Katherine had accused the concert promoters of being negligent for hiring her son's personal physician, Dr. Conrad Murray.

Murray was convicted of involuntary manslaughter for giving the King of Pop a fatal overdose of the anesthetic propofol in 2009. 

The jury found that AEG Live, while promoting the singer's This Is It comeback concert, was not liable for Murray's actions.

Close family: Michael Jackson and his mother are shown in May 2005 at the singer's child molestation trial in Santa Maria, California

They found that Murray was neither 'unfit' nor 'incompetent' when he was hired by AEG.

The Jackson family last month filed an appeal challenging a judge's decision to dismiss two AEG defendants early in the case, CEO Randy Phillips and concert tour producer Paul Gongaware.

But the most recent filing claims the Jackson family did not have fair proceedings at the trial and asks for a second chance to convince a jury, according to TMZ. 

Jackson children: Michael's children Prince, Paris and Blanket, shown in 2012 in Los Angeles, stand to gain millions of dollars if AEG Live is found responsible

The family claim there were numerous reasons to grant another trial, including: jury misconduct, new evidence and general procedural errors.

A judge has not yet ruled on the family's request.

In her first trial, Katherine was seeking hundreds of millions of dollars in damages for herself and her late son's three children, Prince, Paris and Blanket.

Murray was released from jail in October after he served less than two years of a four-year sentence for involuntary manslaughter.

Family attorney: Jackson family lawyer Brian Panish, shown in September in Los Angeles, took on AEG Live in the long case but failed to convince a jury