The District Attorney's Office did not say what the charges would be or who would be charged. The lawyer for Dr. Conrad Murray -- Jackson's personal physician, who was with him when he died -- has said he expected Murray to be charged.

It was unclear whether Los Angeles police would arrest Murray or whether the doctor would be allowed to turn himself into authorities for booking and a bond hearing Monday.

Charges were expected to be filed on Friday, but they were delayed because prosecutors and Murray's chief defense lawyer, Ed Chernoff, failed to reach agreement on a surrender deal for the doctor, a law enforcement source with detailed knowledge of the talks said.

A surrender, in which a defendant turns himself in at a police station for booking, would allow the doctor to avoid being seen in public handcuffed and escorted by police.

"An arrest of Dr. Murray would be a waste of money, time and resources," Chernoff said last week. "We've always made it clear: ' You tell us where; we'll be there.' "

The doctor traveled to Los Angeles at the end of January from his home in Houston, Texas, in expectation of possible charges, his lawyer said.

Murray used part of his time last week to visit the pop star's resting place at Forest Lawn Memorial Park in Glendale, California.

Murray, a cardiologist, was hired as Jackson's personal physician last spring as the singer prepared for comeback concerts in London, England.

The doctor told Los Angeles police that he was with Jackson at his $100,000-a-month rented Holmby Hills mansion through the early morning hours of June 25, 2009, in an effort to help the pop star fall asleep, according to a police affidavit.

He administered sleep aids, and after Jackson finally began sleeping in the late morning hours, Murray said, he left the bedroom for "about two minutes maximum," the affidavit says.

"Upon his return, Murray noticed that Jackson was no longer breathing," it says.

The doctor stayed with Jackson as an ambulance rushed him to UCLA Medical Center.

Efforts at CPR proved fruitless, and Jackson was pronounced dead at 2:26 p.m.

The Los Angeles County coroner ruled Jackson's death a homicide, resulting from a combination of drugs, primarily propofol and lorazepam.

The coroner's statement said Jackson died from "acute propofol intoxication," but there were "other conditions contributing to death: benzodiazepine effect." Lorazepam and two other drugs Murray said he used are benzodiazepines.

The doctor told investigators he had given Jackson three anti-anxiety drugs to help him sleep in the hours before he stopped breathing, a police affidavit said.

Murray had been treating Jackson for insomnia for six weeks at the time of the singer's death. The doctor told investigators he gave Jackson 50 milligrams of propofol, the generic name for Diprivan, diluted with the anesthetic lidocaine every night via an intravenous drip.

The doctor told police he was worried that Jackson was becoming addicted to the drug and tried 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.

Source: cnn.com