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Prosecutors are called key witnesses to the stand  in an attempt to show Murray delayed calling authorities on the day the King of Pop was found lifeless and was intent on concealing indications that he had been giving the singer doses of the surgical anesthetic.

Day 2: Michael Jackson Murder Case Brings Tales Of Death & Addiction

Alberto Alvarez said Dr. Conrad Murray grabbed the vials from a nightstand next to Jackson, who was still in his bed. “He said ‘Here, put these in a bag.'” Alvarez said of Murray. Alvarez said at first he thought he was bagging the items in preparation for a trip to the hospital. He said he trusted Murray because he was a doctor.

“In my personal experience, I believed Dr. Murray had the best intentions for Mr. Jackson,” Alvarez said. “I didn’t question his authority.”

Walgren played Alvarez’s 911 call for jurors. “He’s pumping the chest, but he’s not responding to anything, sir,” Alvarez told the dispatcher, urging them to send an ambulance quickly. He said, after hanging up with dispatchers, he performed chest compressions on Jackson while Murray gave the singer mouth-to-mouth resuscitation efforts. The doctor remarked it was his first time performing the procedure.

“‘I have to,'” Alvarez recalled Murray telling him, “‘this is my friend.'”

Earlier, Alvarez testified that Jackson was in good spirits at a rehearsal on the night before he died.

“He was very happy,” Alvarez testified. “I do recall he was in very good spirits.”

Prosecutors have been calling witnesses who were with Jackson and Murray the day the singer died. Authorities accuse Murray of giving Jackson a lethal dose of the anesthetic propofol in the bedroom.

Day 1: What Is The Michael Jackson Case About?