Michael Jackson’s doctor has been charged with involuntary manslaughter in the pop legend’s death.

The count alleges that Dr. Conrad Murray — the Houston physician who was with the King of Pop when he died last summer – “did unlawfully, and without malice, kill Michael Joseph Jackson…in the commission of an unlawful act, not amounting to a felony; and in the commission of a lawful act which might have produced death, in an unlawful manner, and without due caution and circumspection.”

Murray’s attorney Ed Chernoff says the doctor will plead not guilty.

Jackson, 50, hired Murray to be his personal physician as he prepared for a strenuous series of comeback performances at London’s O2 Arena last summer. Murray is believed to have given Michael an overdose of Propofol to treat the singing legend’s struggle with insomnia.

Propofol is a hospital-strength anesthetic, so it’s unusual that it was being used simply help the star sleep.

The cardiologist is scheduled to be arraigned at the courthouse adjacent to the Los Angeles International Airport Monday afternoon at 4:30 ET/1:30 PT. If convicted, Murray could face up to 4 years in prison.