A lengthy police investigation into Jackson’s death on June 25 has been completed and the case will be passed to the Los Angeles district attorney’s office within the next few weeks.
In order to prove involuntary manslaughter prosecutors will have to show that Dr Murray was negligent in his care of Jackson. Under California law the charge carries a maximum sentence of four years.
The move to pursue a charge of involuntary manslaughter was first reported by TMZ, the celebrity website that originally broke the news of Jackson’s death.
A law enforcement source later told the Associated Press that prosecutors would present their case to a grand jury and seek an indictment on that charge.
A spokeswoman for Dr Murray said the doctor had no comment and reiterated his claim that he neither prescribed nor administered anything that should have killed Jackson.
The singer died after suffering cardiac arrest at a mansion he was renting in Los Angeles where he was preparing for a series of concerts in London.
The Los Angeles coroner’s office ruled that his death was homicide after forensic tests found the powerful sedative propofol, and at least two other sedatives, in his system.
Dr Murray has admitted administering propofol to Jackson on the day he died to help him sleep but he claims the amount, 25 milligrams, was small and should not have been fatal.
He has previously described how he was treating Jackson for insomnia and had been trying to wean him off propofol.