Michael Jackson Death Timeline in Question

Los Angeles - One of the big questions that remains unanswered is when exactly did Michael Jackson die? Hal Eisner talked with our team of legal experts to find out how important that might be.

J. Michael Flanagan:
What is your best estimate of the time of death?

Richelle Cooper:
"I don't know."

UCLA emergency room Dr. Richelle Cooper says she doesn't know because Dr. Murray didn't tell her, didn't give her any records about drugs or dosages, and... she didn't ask.

Nobody knows exactly what time he died. Nobody knows.

Steve Cron:
"We don't know. There's no way of telling. We don't know how long the propofol was in his system. If he was dead on arrival or dead at the hospital."

Leo Terrell:
"We don't know if its when Murray was in the room, if he was on the phone, if he was out of the room, if Jackson injected the propofol by himself. We don't know."

Leo Terrell, Steve Cron, Meline Mkrtchian and Mike Kraut are analyzing it all for us.

Mike Kraut:
"They found too many pills in his stomach. Possibly propofol in the stomach. We know the doctor didn't administer propofol by his stomach as to what happened."

Meline Mkrtchian:
"Prosecution is just laying the groundwork for what happened at this time and that time."

Steve Cron:
"I don't think the time of death is critical. What the prosecution is going to say is we don't have a time of death because Dr. Murray was in charge."

Leo Terrell:
"Timeline is critical and if that can not be answered in that jury room that's going to cut in favor of Dr. Murray."

Mike Kraut:
"This would not be the first case that a doctor got duped by a client when the user went behind his back, self-medicated and hurt themselves."

Testimony and evidence are what will either prove the case or create a shadow of doubt.

Was the doctor responsible for the singer's death or did Jackson play a role? Only time and an accurate timeline -- including exactly when he died -- will tell.