he died . A source involved in the investigation into Jackson 's death has told CNN that investigators found numerous bottles of prescription drugs in his $ 100,000-a-month rented mansion in Holmby Hills , California . Watch report on the warrants '' The items taken from Murray 's home included copies of his computer and cell phone hard drives . They were to be turned over to the Los Angeles Police Department , which is leading the investigation into Jackson 's death last month at age 50 . Murray is the central focus of a federal investigation into the singer 's death , a law enforcement official told CNN on Wednesday . Authorities have subpoenaed the records of various doctors who have treated Jackson over the years , but `` Dr. -LSB- Conrad -RSB- Murray is the only one we 're looking at , '' the federal law enforcement official said . The disclosures were among several developments Wednesday in a story that continues to gather steam more than a month after the death of the pop icon on June 25 . Other recent developments : • Jackson 's father , Joe , acknowledged that a 25-year-old Norwegian performer is
LOS ANGELES , California -LRB- CNN -RRB- -- Search warrants filed Thursday in court in Clark County , Nevada , and carried out at properties of Michael Jackson 's doctor imply that investigators looking into his death believe the singer was a drug addict . Dr. Conrad Murray was with Michael Jackson on the day that he died . The warrants , signed by District Judge Timothy Williams and given to CNN by Las Vegas affiliate KTNV , say `` there is probable cause to believe '' that searches would uncover evidence at the Las Vegas home and office of Dr. Conrad Murray of excessive prescribing , prescribing to an addict , excess treatment or prescribing , unprofessional conduct , prescribing to or treating an addict and manslaughter . They cite `` probable cause to believe '' that the premises contained `` records , shipping orders , distribution lists , use records relating to the purchase , transfer ordering , delivery and storage of propofol -LRB- Diprivan -RRB- . '' A source told CNN on Monday that the Texas-based cardiologist allegedly gave Jackson the anesthetic propofol -- commonly known by the brand name Diprivan -- in the 24 hours before