Murray practiced as an interventional cardiologist, which mostly involved placing catheters into the arteries of heart disease patients. Jackson had no known heart issues, which the coroner confirmed in his autopsy report. Jackson's chief medical problem was his insomnia, for which Murray had no special training.
Murray treated Jackson's insomnia with nightly infusions of propofol, a drug that is supposed to be administered only by an anesthesiologist or a nurse anesthetist under the supervision of a doctor. It was an approach to sleep medicine that is universally condemned after the singer's overdose death.
Murray's competence is also questioned by his decision not to use proper monitoring equipment that is standard when putting a patient into a drug-induced coma.
Jackson lawyers say that Murray's dire financial condition, combined with the high salary offered by AEG Live, added to his incompetence. He decided to breach his ethical responsibility to do no harm to his patient because he feared losing the job that offered to deliver him from a mountain of debt, they argue.
AEG Live says that Murray was never sued for malpractice and that he was licensed to practice medicine in four states.
Question No. 3
Did AEG Live know or should it have known that Murray was unfit or incompetent and that this unfitness or incompetence created a particular risk to others?
The Jacksons accuse AEG Live of failing to check Murray's background, which would have revealed he was deep in debt and desperately dependent on the $150,000 a month they agreed to pay him.
Two Los Angeles police detectives testified that they concluded Murray's financial woes were at the root of his motive in the involuntary manslaughter of Jackson. His Las Vegas home was facing foreclosure, he was $1 million in debt and he was behind on support payments for several children, they said. Their suspicions were raised when they read his contract, which said he could lose the lucrative job if the tour was postponed or canceled, they said.
Jackson lawyers argue that AEG Live should have ordered a credit check for Murray because of the sensitive job he was being given. AEG Live lawyers say their executives could not have anticipated that his financial circumstances were relevant to his competency as a doctor.
A music industry veteran hired as an expert witness by Jackson lawyers testified that AEG Live's agreement with Murray set up an "egregious" conflict of interest in which the physician was beholden to the company and himself before Jackson's interests.
It was "not unlike the team doctor for a football team, where the quarterback is injured and the doctor comes to the medical conclusion that the quarterback should be taken out of the game for a period of weeks, but the team doesn't want him out," said David Berman, who once headed Capitol Records. "There is an inherent conflict."
It was the doctor's responsibility, not the concert promoter's, to avoid a medical conflict of interest, AEG Live lawyers argue.
They say their executives had no way of knowing about the dangerous propofol treatments Murray was giving Jackson in the privacy of his bedroom. They presented testimony from a parade of former Jackson doctors and Jackson's youngest brother, Randy, in an effort to show that the pop icon was a drug addict who kept his use of prescription medicines private.
But two doctors called by Jackson lawyers testified they had discussed Jackson's tendency to abuse painkillers, while on tour, with Paul Gongaware when he worked as Jackson's tour manager in the 1990s.
Dr. Metzger testified that he had discussed Jackson's problem with insomnia to Gongaware.
Jackson's former wife Debbie Rowe testified that Metzger arranged for anesthesiologists in Germany to treat Jackson's insomnia between concerts in Munich with propofol in a hotel room in 1997. Gongaware was the tour manager then.
Jurors will have to decide if that is enough evidence to prove that it's more likely true than not true that AEG Live executives should have known that Murray might be using dangerous treatments for Jackson's insomnia as he prepared for his 2009 tour.
Question No. 4
Did Murray's unfitness or incompetence harm Michael Jackson and the Jackson plaintiffs?
If jurors get this far down the verdict form, it means they've answered "yes" to the previous three questions. Since they would have already decided Murray was unfit or incompetent, this question may not take much of their time.
Jackson died of a propofol overdose while under Murray's care, according to the autopsy report. It was not disputed at the trial. Evidence that led to Murray's involuntary manslaughter conviction two years ago was presented to this civil jury.
AEG Live challenged the estimates of economic harm cause by Jackson's death, but jurors saw plenty of evidence of the harm that the plaintiffs -- his mother and three children -- suffered by the loss of a son and a father.
Question No. 5
Was AEG Live's negligence in hiring, supervising or retaining Murray a substantial factor in causing Michael Jackson and the Jackson plaintiffs' harm?