Dr. Conrad Murray said in a police interview played for a jury that he spent months trying to help Michael Jackson with his insomnia, giving him nightly infusions of an anesthetic until realizing the singer was becoming addicted.
Murray is heard in the more-than-two-hour recording - made two days after the King of Pop died - describing his relationship with the star, the medications he gave him and the efforts to save his life.
Murray's account, in an interview played publicly for the first time Friday, was so detailed and graphic that Jackson's sister, Rebbie, rose and rushed from the courtroom during the description of the singer's death scene.
Murray sounded calm. As he neared the end of his story, emotion crept in.
"I loved Mr. Jackson," he told the detectives. "He was my friend. He opened up to me in different ways. I wanted to help him ... I cared for him. I had no intention of hurting him. I did not want him to fail."
He added, "I realized Michael Jackson had a dependency and I was trying to wean him off it."
The June 27, 2009 interview outside a noisy hotel ballroom gave police their first hint that Jackson's death was not from natural causes and that he had been given the powerful anesthetic propofol in an effort to cure his extreme insomnia. CBS News correspondent Bill Whitaker reported on "The Early Show" that Jackson referred to the drug as "milk."
"He's not able to sleep naturally," Murray told the detectives early in the interview.
Prosecutors contend that Murray was reckless by giving Jackson propofol outside a hospital setting and without proper monitoring equipment. They claim he gave the singer a lethal dose of the drug and other sedatives on the day Jackson died.
Defense attorneys say Jackson gave himself the lethal dose after Murray left the room. Murray has pleaded not guilty to involuntary manslaughter. If convicted, he could face up to four years behind bars and the loss of his medical license.
Jurors got about two-thirds of the way through the interview and will hear the remainder of the interview - and some of its most emotional moments - when the trial resumes on Tuesday.
According to a transcript released Friday, detectives asked Murray about his actions at the hospital after Jackson was declared dead, which led the doctor to describe telling the singer's mother and children that the singer had died.
Paris Jackson, the doctor said, was worried about being an orphan and expressed questions about why her father was dead.
"'Dr. Murray, you said you save a lot of patients, you know, you save people with heart attacks and you couldn't save my dad,"' Murray told the detectives Paris Jackson, then 11-years-old, said.
"'I know you tried your best, but I'm really sad," he continued, recounting her words. "'I will wake up in the morning, and I won't be able to see my daddy."'
Murray's account disclosed a long history of Jackson's reliance on propofol.