On Friday the Los Angeles prosecutor's office said it was still uncertain on whether to charge ‘Thriller’ singer Michael Jackson's doctor Dr Conrad Murray with a crime in the singer's sudden death which was caused by cardiac arrest last June.

A spokeswoman for the Los Angeles County District Attorney's office said, "We have nothing pending. No decision has been made and nothing has been filed." She however denied commenting further.

TMZ. com, which is a celebrity website, on Friday, stated unconfirmed law enforcement sources informing that the final investigation was concluded in late December by the Los Angeles police. The cops would soon send the details to the Los Angeles district attorney to determine whether to file criminal charges or not. This would be done within weeks.

County coroner's office has ruled the death of 50-year-old Jackson as homicide by drug overdose Jackson.

Whether to charge Murray or not is being discussed since months now.

Murray's chief attorney, Ed Chernoff, said, "We have refused to comment on stories involving unnamed sources and will continue to do so.”