Dr. Conrad Murray [AUDIO] I Pumped MJ Full of Drugs Before Singer's Death

10/7/2011 11:31 AM PDT

Dr. Conrad Murray: I Pumped Michael Jackson Full of Drugs Before Singer's Death [AUDIO]

Dr. Conrad Murray admitted to police ... he administered dose after dose of multiple, powerful sleeping aids -- including Propofol --  over several hours .... before Michael Jackson died.

Prosecutors just played a portion of Dr. Murray's explosive 2-hour interview with police on June 27th, 2009 -- in which Murray claims Jackson "was unable to sleep naturally."

Murray told police, beginning around 1:30 AM, he gave MJ multiple doses of Lorazepam and Medazolam over the course of 9 hours on June 25th, 2009 to help the singer sleep -- but the drugs had no effect -- and then gave him other drugs as well.

Around 10:40 AM -- less than two hours before MJ's security guard called 911 -- Murray said he gave MJ 25mg of Propofol to put him to sleep ... claiming, "I took all precautions that were available to me."

Murray said he gave MJ Propofol daily -- with a few exceptions ... because he was trying to ween the singer off the "milk." According to Murray, "Michael loved that drug."