Day three of the Conrad Murray trial saw the most dramatic testimony yet about the bedlam inside Michael Jackson's bedroom on the day he died.
Alberto Alvarez was the first bodyguard to reach Jackson's room after a panicked call for help from Dr. Conrad Murray who is now on trial for manslaughter.
On the stand, Alvarez said, "When I came into the room he said, 'Alberto, hurry. We have to get him to a hospital. We have to get an ambulance!' I asked Dr. Conrad Murray what happened, he said, 'He had a bad reaction.' "
As Alvarez ran into the room, he saw Michael Jackson lying on his bed.
Alvarez said, "He was laying on his back with his hands extended out."
"You've indicated extended out to his side with the palms up," said an attorney.
"Yes, sir. And I observed that his eyes were slightly open and his mouth was open," said Alvarez.
As Dr. Murray desperately performed CPR, Alvarez says Jackson's devastated children Prince and Paris watched.
Alvarez told the courtroom, "Paris screamed out 'Daddy!' and Dr. Conrad Murray said, 'Don't let them see their dad like this.' I proceeded to turn around to the children and kind of ushered them out and said, 'Kids, don't worry. We'll take care of it. Everything's going to be okay."
The bodyguard told the hushed courtroom that Murray then ordered him to stash away vials of medicine and an IV bag.
"He reached over and grabbed a handful of vials and then he reached out to me and said, 'Here, put these in a bag.' " said Alvarez.
"Why were you following these instructions?" asked an attorney.
"Well, in my personal experience, I believed that Dr. Conrad Murray had the best intentions for Mr. Jackson," replied Alvarez.
Alvarez then called 911.
Alvarez: "I need an ambulance as soon as possible, sir. We have a gentleman here that needs help and he's stopped breathing."
911 Operator: "Did anybody witness what happened?"
Alvarez: "No, just the doctor, sir. The doctor's been the only one here."
The bodyguard's testimony is critical to the prosecution's claim that Dr. Murray was trying to cover up evidence that he'd given Michael Jackson the powerful anesthetic Propofol as a sleeping aid.
HLN's Jane Velez-Mitchell told INSIDE EDITION, "It's the most important aspect of the trial, really, because it's a gross deviation in and of itself. Perhaps the worst thing he did."
Listening to testimony about those final tragic moments in Michael's bedroom was heart wrenching to the Jackson family, who once again attended court together in a show of unity.
Tru TV's In Session correspondent Beth Karas told INSIDE EDITION, "To hear the bedlam, the chaos, what was going on in that bedroom, and that it was preventable from the state's point of view, is very sad for the family. I saw Katherine Jackson with a tissue in her hand. I couldn't tell if she was actually dabbing her eyes because I was behind her, but she was sort of hunched over."
Meanwhile, Tom Mesereau, Michael Jackson's former attorney, told INSIDE EDITION he's furious that the defense is blamiing Michael Jackson for his own death.
"I am on the side of the prosecution. I'm outraged at what he did to Michael Jackson. I don't think any of this was necessary. I think he was greedy, and selfish, and foolish," said Mesereau.