LOS ANGELES, California (X17online) - Michael Jackson's family has apparently been told the investigation into his death could turn into a criminal investigation.

"The family is aware of a potential criminal prosecution," an unidentified source told CNN on Thursday.

The comments came on the same day that LA Police Chief William Bratton said detectives were awaiting the coroner's report to decide whether to proceed with the investigation as a homicide or an accidental overdose.

Bratton said detectives have spoken to a number of doctors who have treated Jackson over the years and they are looking into the singer's prescription drug history. Bratton said, "We are still awaiting corroboration from the coroner's office as to cause of death.

That is going to be very dependent on the toxicology reports that are due to come back. And based on those, we will have an idea of what it is we are dealing [with]: are we dealing with a homicide or are we dealing with accidental overdose?"

Doctors who did not cooperate with investigators were given subpoenas, and if necessary, authorities will issue more. Bratton added that investigators are being assisted by DEA agents and the state attorney general's office on a case that he called "a comprehensive set of inquiries."

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