Michael Jackson's doctor charged with manslaughter

Investigators have decided first to carry out a further search warrant, probably on a Los Angeles pharmacy, in an attempt to gather more evidence against Dr Murray, the law enforcement source told Fox News.

Criminal charges related to medical malpractice were also likely against Dr Arnold Klein, the singer’s longtime dermatologist, Fox has been told.

A spokesman for the Los Angeles County District Attorney’s office said there was no way to know who may be charged, and with what, until police complete their investigation.

Investigators were reportedly keen initially to charge Dr Murray with second degree murder but feared a jury would not convict if there was no motive.

According to the Telegraph.Co.Uk, sources within the investigation have already made clear they believed that Jackson died after Dr Murray gave him a powerful, surgical anaesthetic through a drip-feed to help him sleep.

They are understood to believe that Dr Murray, who has various celebrity clients, gave the singer propofol, a drug usually given to patients in hospital conditions before surgery. Investigators believe the drug was at least a contributory factor in the 50-year-old singer’s death.

The Las Vegas-based doctor’s lawyer has said he never prescribed or administered any drug that “should have killed” Jackson, but he never specified whether he ever gave the singer propofol.