Prosecutors will seek an involuntary manslaughter indictment against Dr. Conrad Murray, seen in 2007, in the death of pop star Michael Jackson, The Associated Press has learned. ((Houston Chronicle/Associated Press) )

The Associated Press has learned that prosecutors will seek an involuntary manslaughter indictment against Michael Jackson's doctor for the pop star's death.

A law enforcement source says Dr. Conrad Murray will be prosecuted on a theory of gross negligence. The person spoke on condition of anonymity because the investigation remains open.

Before an indictment can be sought, the person says the Los Angeles Police Department will follow the formality of presenting the case to the district attorney.

Both agencies, along with the U.S. Drug Enforcement Agency and the California Bureau of Narcotics Enforcement, have been working on the case. 

Jackson died at his Los Angeles home in June while under Murray's care as the singer prepared for an ambitious concert schedule.

Miranda Sevcik, a spokeswoman for Murray in Houston, and his lawyer, Edward Chernoff, said the doctor had no comment and reiterated he neither prescribed nor administered anything that should have killed Michael Jackson.