Michael Jackson's mother had no idea her son had a personal physician until he died, according to the detective who interviewed her six months after the tragedy. Det. Orlando Martinez took the witness stand for a second day of the wrongful death trial and told the court Katherine Jackson confessed she had never met Dr. Conrad Murray until the day her son died in June, 2009. Katherine is suing concert bosses at AEG Live, the promoters behind the singer's doomed This Is It London concerts, claiming they were negligent in ignoring her son's life-threatening health concerns. She is also holding them responsible for hiring Murray, the medic who was convicted of involuntary manslaughter for administering the dose of anaesthetic propofol which killed the King of Pop. Det. Martinez told the court that when he interviewed Katherine in December, 2009, she revealed she didn't know of Murray's existence until her son died. Reading his summary of the interview, he said, "When asked if Mrs. Jackson had ever met Dr. Murray she stated that she had not and didn't even know who he was until after Michael's death." The detective also revealed that the Jackson family matriarch had told him about an attempted intervention with Michael at his Neverland ranch home in California that had not gone to plan - because the King of Pop didn't accept he had a drug problem. During Thursday's (02May13) proceedings, AEG Live lawyers again objected to the presence of Jackson family members in the courtroom after spotting Katherine's daughter Rebbie, a potential witness, by her side. Judge Yvette Palazuelos overruled the objection, stating, "I think Mrs. Jackson should have at least one support person in the courtroom." Earlier this week (beg29Apr13), the defence team requested that Randy Jackson, who was in court with his 82-year-old mother, was asked to leave, but Katherine's lawyer Brian Panish told Judge Palazuelos that the family matriarch needed one of her children to sit with her each day. Palazuelos ruled, "He can remain, but you cannot have five (people with you) in the courtroom."