Michael Jackson's Doctor, Conrad Murray, Charged in Singer's Death

Michael Jackson's physician appeared in a Los Angeles courtroom Monday where he pleaded not guilty to charges of involuntary manslaughter in the pop singer's death, capping an eight-month investigation and kicking off what is expected to be a closely watched celebrity trial.

After a lengthy investigation, Los Angeles prosecutors charged the Houston-based cardiologist with allegedly administering a lethal cocktail of painkillers and anesthetics to the entertainer hours before he died on June 25.

Involuntary manslaughter carries the shortest sentence of any homicide charge in California. If convicted, Murray faces up to four years in prison.

An investigator's narrative released Monday by the L.A. County's coroner's office included new details of the June evening Jackson's body was found. Jackson's bedroom is described as outfitted with the usual furnishings: a queen-sized bed, chairs, a dresser and a television.

VIDEO: Dr. Conrad Murray is charged with involuntary manslaughter for singers death.Play

There was also "a green oxygen tank" beside the bed and bottles of prescription medication scattered over several tables, along with medical supplies such as latex gloves, a box of catheters, disposable needles and alcohol pads.

The 51-page coroner's report also described Jackson's vitiligo, the pigmentation-lightening disease the singer was said to have suffered with. His skin had "patches of light and dark pigmented area. His hair "was sparse" and woven into a wig. His lips and eyebrows had been permanently tattooed.

The autopsy report concludes that "the cause of death is acute propofol intoxication" and that "the standard care for administering propofol was not met ... Recommended equipment for patient monitoring, precision dosing, and resuscitation were not present."

Lethal InjectionPlay
Conrad Murray Charged in Jackson's Death

Murray appeared in court Monday in a gray suit. Seated behind the prosecution were several of Jackson's family members including his father Joe, mother Katherine, and sibling Jermaine, Tito, Jackie, Randy and LaToya.

A judge set bail at $75,000 and Murray was ordered to stop administering sedatives in his medical practice.

"I don't want you sedating people," Judge Keith Schwartz told Murray who will be permitted to continue practicing cardiology and write some prescriptions.

A large contingent of reporters and camera crews dwarfed the cadre of fans who ringed the courthouse, some of whom carried signs calling for "Justice for Michael Jackson."

VIDEO: Authorities step up investigation by raiding Dr. Conrad Murrays office.Play

One fan carried a sign that read: "No special treatment for Conrad 'Murderer.'"

The charges come after weeks of negotiations between prosecutors and Murray's lawyers about when and where the doctor would make himself available to be indicted.

Murray, 56, has been in Los Angeles for the past two weeks, meeting with his defense team and waiting for the District Attorney to formally charge him.

Following an autopsy and the release of a much-anticipated toxicology report last fall, investigators concluded that Murray administered to Jackson, 50, the powerful anesthetic propofol and mixture of other sedatives that led to his death.

"Murray did unlawfully, and without malice, kill Michael Joseph Jackson…in the commission of an unlawful act, not amounting to a felony; and in the commission of a lawful act which might have produced death, in an unlawful manner, and without due caution and circumspection," prosecutors said in a statement.

Video: Jacksons doctor reaches jail free child support agreement.Play

Earlier this month, Murray hired J. Michael Flanagan, an L.A.-based defense attorney, who is reportedly the only attorney in California to have ever won an acquittal on an involuntary manslaughter case involving propofol.

In 2004, Flanagan successfully defended a nurse, Amy Brunner, accused and ultimately acquitted of involuntary manslaughter.

Brunner was accused of leaving a syringe full of propofol out for another nurse to administer to an 80-year-old cancer patient who died within minutes of receiving the shot.

"I'm probably the only attorney in town that has successfully tried a propofol case involving death," Flanagan told TMZ earlier this month.

VIDEO: The doctor at the center of the Jackson investigation reaches out on YouTube.Play

The charges end an eight-month investigation that included countless interviews with Jackson's previous physicians, coordinated raids on Murray's home and offices in Texas and Las Vegas, and a weeks-long wait for the results of a toxicology report.

Defense attorneys not affiliated with the case said the prosecution ultimately will have a difficult case to make once they go to trial.

"The prosecution has to prove gross negligence and that Dr. Murray acted recklessly," said Laurie Levinson, a professor at Loyola Law School.

"They have to show more than just malpractice," she said. "They have to prove criminal negligence. That's not going to be easy. Terrible accidents happen all the time. Was [Murray] warned that something could happen? Did he know the risks?"

Involuntary manslaughter, she said, was "the lowest level of homicide in California," carrying a potential sentence of 2 to 4 years in prison.

According to police reports, Murray found Jackson dead in the singer's Los Angeles rental home before administering cardiopulmonary resuscitation and requesting that a Jackson employee call 911.

In October, the coroner's office released a statement saying Jackson died from an overdose of the hospital-grade anesthetic propofol.

The coroner also cited the powerful sedative benzodiazepine as contributing to the singer's death. A toxicology screen and search of Jackson's home found several other drugs in the singer's body and bedroom.

Murray was hired to accompany Jackson for a scheduled series of concerts to be held in London last summer. Jackson died just weeks before the tour was to begin.

Murray has denied any criminal wrongdoing.

"We continue to maintain that Dr. Murray neither prescribed nor administered anything that should have killed Michael Jackson," said Miranda Sevcik, a spokeswoman for Murray's legal team.

ABC News' Jim Vojtech and Kaitlyn Folmer contributed to this report from Los Angeles.