His lawyer told US publication People that the doctor could be charged as early as Wednesday, and that he was in LA and prepared to go to court.
According to reports in the US, Doctor Murray faces being charged with involuntary manslaughter for allegedly administering hospital anaesthetic Propofol in the king of pop's home before his June 2009 death.
Involuntary manslaughter is when a death is the indirect result of negligence or recklessness.
Doctor Murray has always maintained that he didn't administer anything to Michael that would have killed him.
If he is charged, a judge would hear the evidence and decide if he should be put on trail.
The Thriller singer's death was ruled as homicide, which - under Californian law - means he was killed either accidentally or on purpose.
The Los Angeles coroner ruled that Michael was killed primarily as a result of Propofol, though other drugs were detected in his system.