Michael Jackson's doctor, Dr. Conrad Robert Murray, is being interviewed by LAPD detectives who are investigating the singer's death, Officer Karen Rayner, spokesperson for the LAPD, told RadarOnline.com.

Dr. Conrad Murray, 51, who is licensed in Texas, Nevada and California, was administering CPR to the performer Thursday when paramedics arrived at his rented Holmby Hills home.

Our detectives had a brief conversation with Dr. Murray, where or the contents of that conversation took place, I can't tell you, Rayner said.

Rayner also said that media reports that Dr. Murray was missing are erroneous. according to the report.

Detectives will be talking with him again at some point. I don't know when that will be. Dr. Murray's vehicle was towed from Michael Jackson's home last night as part of the investigation, she added.

Speculation is mounting that Jackson stopped breathing and suffered a heart attack after taking an injection of a morphine-based painkilling drug.

Members of Jackson's entourage told hospital staff that he had taken the drug Demerol, a commercial name for pethidine.

The Sun newspaper quoted a source as saying: Shortly after taking the Demerol he started to experience slow shallow breathing. His breathing gradually got slower and slower until it stopped.

Click here for the full coverage of Michael Jackson's tragic death.

Meanwhile, celebrity website TMZ, which first broke the news of Jackson's death, said sources had told them that Jackson had taken a heavy dose of morphine prior to his death. TMZ.com reported that Dr. Murray doctor lived with Michael Jackson at his home.