The president of AEG Live was reprimanded in court on Monday (10Jun13) for arguing with prosecutors in the Michael Jackson wrongful death trial and appearing to evade questions.

Los Angeles County Superior Court Judge Yvette Palazuelos sent jurors out of the courtroom on Monday afternoon and pulled Randy Phillips aside to give him a stern warning about his behaviour during his fourth day on the witness stand.

Judge Palazuelos told him, "Arguing with the lawyers is not going to help. It's not going to help your case. It's not going to help anybody. It's lengthening your testimony."

The superstar's mother, Katherine Jackson, and his three children are suing AEG Live bosses amid claims they were responsible for hiring Dr. Conrad Murray, the medic who was convicted of administering the fatal drug dose which killed the King of Pop on 25 June, 2009. The plaintiffs also accuse company executives of ignoring key signs the singer was seriously ill as he prepared to embark on his This Is It residency in London.

Phillips had previously insisted he had no knowledge of Jackson's prescription drug use in the run up to his mammoth concert tour, but emails shown in court revealed the executive's own worries about treatment the star received from dermatologist Dr. Arnold Klein.

In one message, dated two days before the artist's death, Jackson's business manager Michael Kane told Phillips that they had been sent a $48,000 (£30,968) invoice for injections of Botox, Restalyne and other unidentified shots, to which Phillips replied, "He (Klein) scares us to death because he is shooting him up with something."

Testimony given during Murray's involuntary manslaughter trial in 2011 indicate that Klein treated Jackson with injections of narcotic painkiller Demerol in the three months prior to his death.

However, it was a powerful dose of surgical anaesthetic Propofol which eventually claimed the life of the King of Pop.

The trial continues.