LOS ANGELES , California ( CNN ) -- Michael Jackson 's personal physician , Dr. Conrad Murray , administered a powerful drug that authorities believe killed the singer , a source with knowledge of the investigation confirmed to CNN on Monday . Dr. Conrad Murray was with Michael Jackson on the day that he died . Murray , a Texas-based cardiologist , allegedly gave Jackson the anesthetic propofol -- commonly known by the brand name Diprivan -- in the 24 hours before he died , the source said . The doctor 's attorneys in a statement Monday said they would n't comment on `` rumors , innuendo or unnamed sources . '' In the past , they have said Murray never prescribed or administered anything that could have killed the pop star . Murray was the doctor who was at Jackson 's home when the pop star died on June 25 . Watch CNN 's Ted Rowlands report on drug allegation » . Last week , Texas authorities searched Murray 's Houston medical office and storage unit , looking for `` evidence of the offense of manslaughter , '' according to court documents . Among the items removed from Murray 's office were a computer ; 27 tablets of phentermine , a prescription-strength appetite suppressant ; 1 tablet of clonazepam , an anti-anxiety medication ; and some Rolodex cards . From Murray 's storage unit , authorities removed two computer hard drives ; and `` important contact list ; '' a suspension notice from Houston 's Doctor Hospital ; notices from the Internal Revenue Service ; and a laundry list of medical and hospital documents . Ed Chernoff , a Houston lawyer hired by Murray soon after Jackson 's death , confirmed at the time that Los Angeles Police detectives and federal Drug Enforcement Administration agents used a search warrant to enter Murray 's office in northeast Houston on Wednesday morning . Chernoff said members of Murray 's legal team were at the medical office during the search , which he said `` was conducted by members of the DEA , two robbery-homicide detectives from the Los Angeles Police Department and Houston Police officers . '' Tammy Kidd , a spokeswoman at Chernoff 's office , told CNN the search `` was absolutely a surprise to us , because we 've had open lines of communication this whole time . '' Police have interviewed Murray twice since Jackson 's death . A third interview was scheduled for July 24 , but was postponed after the search warrants were executed . It 's unknown when the next interview will take place . Among those who have indicated that Jackson may have been using dangerous prescription medication are nutritionist Cherilyn Lee , who said Jackson pleaded for the powerful sedative Diprivan despite being told of its harmful effects . Meanwhile , the Los Angeles County coroner 's office continues to investigate the cause of Jackson 's death on June 25 . It has been waiting on toxicology lab results , but a final autopsy report is expected as soon as this week , a coroner 's spokesman has said . CNN 's Ted Rowlands contributed to this report .
Murray allegedly gave Jackson propofol in the hours before death , source says . Sources close to Jackson say doctor administered drug believed to have killed singer . Detective Conrad Murray was with Michael Jackson on day that he died . Police have interviewed Murray twice since Jackson 's death .