Los Angeles authorities have officially changed the death certificate belonging to late King of Pop, Michael Jackson to reflect an exact cause of death. Updated due to the completion of a lengthy investigation, Jackson’s cause of death has now been labeled a murder due to ‘acute Propofol intoxication’ via an ‘intravenous injection from another’. Jackson’s original death certificate was filed July 7. While the official cause of death has been revealed, embattled Dr. Conrad Murray remains a free man. Sources say the Jackson family, specifically Joe Jackson, still believe more than one person is responsible for the entertainer’s death. “Joe won’t give up on getting justice for his son and a lawsuit is his focus,” a source told Daily Mail. As previously reported, sources close to the investigation told TMZ they believe Murray will be charged with involuntary manslaughter.