[Updated, 8:22 p.m.] Murray, the pop star's personal physician, has been charged with voluntary manslaughter in Jackson's death on June 25, 2009.
The Los Angeles coroner concluded Jackson died of "acute propofol intoxication."
Murray told investigators he gave Jackson propofol, a powerful anesthetic, to help him sleep. The defense spokeswoman said "we can only assume" the investigation report was leaked by prosecutors since it was not done by the defense.
"These ridiculous tactics by the DA's office have no other purpose but to take a peek at our defense, because they aren't secure enough in their own case to convict Dr. Murray so they have to pull these little tricks to try to get to him," she said. "We're not taking the bait."
"We have an explanation obviously," Sevcik said. "But how much do share at this point and how much do we share in court?"
Murray, who was with Jackson when he died, is charged with involuntary manslaughter by acting "without malice" but also "without due caution and circumspection."
Jackson, who hired Murray as his physician while he prepared for what was to have been a series of comeback concerts, called the doctor to his rented Holmby Hills mansion last June 25 at about 1 a.m., the report said. "The decedent complained of being dehydrated and not being able to sleep," it said.
A police affidavit previously made public said that the doctor told investigators he gave Jackson three anti-anxiety drugs to help him sleep that morning.
Murray told them he had been treating Jackson for insomnia for six weeks at the time of the singer's death. He had given Jackson 50 milligrams of the sedative propofol diluted with the local anesthetic lidocaine every night via an intravenous drip.
The doctor told police he was worried that Jackson was becoming addicted to the drug and was trying to wean him off it.
During the two nights before Jackson's death, Murray said, he put together combinations of other drugs that succeeded in helping Jackson sleep.
[Posted, 7:05 p.m.] Dr. Conrad Murray's defense team accused prosecutors Monday of leaking a police report to a reporter to force them to reveal their defense strategy.
The "death investigation police report" includes a statement from a witness who said Murray stopped resuscitation efforts on Michael Jackson so he could collect drug vials, Miranda Sevcik, a spokeswoman for defense lawyer Ed Chernoff, said.
"The testimony of the witness was taken two months after he gave testimony to police investigators at the scene and his story totally changed," Sevcik said. "It is not going to hold up under cross-examination."
Sandi Gibbons, the spokeswoman for the Los Angeles District Attorney, said prosecutors did not provide the document to the Associated Press, which initially reported on the document.
"We haven't given anybody anything," Gibbons said.