Edward Chernoff, who represents Dr. Conrad Murray, the doctor who was with Jackson hours before his death and the subject of a federal probe, issued a statement Tuesday saying the sealed search warrant "authorized investigators to look for medical records relating to Michael Jackson and all of his reported aliases."
According to the Los Angeles Times, the aliases used were: Omar Arnold, Paul Farance, Bryan Singleton, Jack London, Michael Amir Williams Muhammad, Jimmy Nicholas, Blanca Nicholas, Roselyn Muhammad, Faheem Muhammad, Frank Tyson, Fernand Diaz, Peter Madonie, Josephine Baker and Kai Chase. Prince Jackson, Jackson's 12-year-old son, was also listed in the warrant.
Harvey Levin, executive producer of the celebrity Web site TMZ.com, told "Early Show" co-anchor Harry Smith Wednesday that TMZ has records showing Jackson used aliases as far back as 1993. "He used employees of the Neverland Ranch, he used fictitious people," Levin said. "He used the name Josephine Baker, even.
"But this has been going on, not just with Drr. Murray, but literally dozens of other doctors. ... The LAPD and the coroner's office have quietly been going to other doctors. Subpoenas have been served. This is going to open up a massive investigation into what authorities believe could be gross fraudulent prescribing practices. There are a lot of people who are very nervous in Beverly Hills and west L.A. right now."
Murray is "absolutely" just the tip of that iceberg, Levin said.
Federal agents as the investigation into Jackson's death widens over whether administering a powerful anesthetic as a sleep aid was so reckless that it constitutes manslaughter.
Such charges against a doctor for the death of a patient are extremely rare. Authorities would have to show there was a reckless action that created a risk of death.
After a three hour-search of Murray's sprawling home near the 18th hole of a golf course in a private gated community, Los Angeles police and federal Drug Enforcement Administration agents carried away five or six plastic storage containers and several thick manila envelopes. Across town authorities searched Murray's medical offices, Global Cardiovascular Associates Inc., for nine hours seeking documents. Investigators removed several boxes but declined to describe what they had seized.
Murray was present during the search of his home and assisted the officers, who seized cell phones and a computer hard drive, Chernoff said.
Though authorities characterize Murray as the target of the investigation, they have stopped short of labeling him a suspect.
Murray told investigators he administered the anesthetic propofol to Jackson the night he died to help him sleep, according to a law enforcement official who spoke to The Associated Press on condition of anonymity because the investigation is ongoing. The official told AP that Murray left the bedroom where Jackson was sedated and returned to find the star not breathing. It's unclear how long Murray was out of the room.
The official said investigators are working under the theory that propofol caused Jackson's heart to stop. Toxicology reports that should show what killed Jackson are expected as early as this week.
Propofol typically is used to render patients unconscious for surgery. The drug can depress breathing and lower heart rates and blood pressure.
Home use of propofol is virtually unheard of, and if Murray left Jackson's side he would have violated guidelines for the safe use of the drug drawn up by the American Society of Anesthesiologists.
Those rules say a physician "should be physically present throughout the sedation and remain immediately available until the patient is medically discharged from the post procedure recovery area."
In considering a manslaughter charge against a doctor, a patient's complicity in taking the risk could reduce the doctor's culpability, said Harland Braun, a prominent Los Angeles defense attorney who has represented doctors in cases involving administering of drugs.
If a doctor is aware of the risk, there might also be an issue of whether the patient knows that risk and decided to take it.
Chernoff has said the doctor "didn't prescribe or administer anything that should have killed Michael Jackson." He declined interview requests Tuesday.
The search of Murray's home and business involved members of the DEA's Los Angeles Tactical Diversion Squad, agency spokesman Jose Martinez said. The team typically looks into cases involving legally prescribed drugs such as narcotic painkillers that are illegally sold or obtained by people not authorized to have them, such as "doctor shoppers" who get medications from several physicians so they can sell the drugs or feed their addiction.
Lt. Greg Strenk of the Los Angeles police robbery and homicide division said outside the medical office that the searches had been completed in Las Vegas but the investigation was ongoing.
The Las Vegas searches were the second time in less than a week that investigators targeted Murray's property. Last week authorities searched his Houston clinic and a storage unit. Court records show they were seeking evidence of whether the doctor committed manslaughter.
Murray, 56, who is licensed in California, Nevada and Texas, became Jackson's personal physician in May and was to accompany him to London for a series of concerts starting in July.
He was staying with Jackson in the entertainer's rented Los Angeles mansion and, according to Chernoff, "happened to find" Jackson unconscious in his bedroom the morning of June 25. Murray tried to revive him by compressing his chest with one hand while supporting Jackson's back with the other.
It took up to a half hour before paramedics were called, Murray's lawyers have said. The paramedics arrived about three minutes later and tried to revive the pop star for another 42 minutes before taking him to nearby UCLA Medical Center, where Jackson was pronounced dead.
Jackson is believed to have been using propofol for about two years and investigators are trying to determine how many other doctors administered it. Murray told investigators he had given Jackson the drug several times before, the law enforcement official told AP.
As investigators try to untangle Jackson's complex medical history they have interviewed at least six doctors who treated him and searched records for transactions involving aliases Jackson may have used to get drugs.
The official said Murray directed investigators to a closet in the room where Jackson slept. In it, they found enough propofol and sedatives to fill two gym bags. The room also contained an IV line and three tanks of oxygen, which would be needed for administration of propofol.