Michael Jackson Michael Jackson

Could Michael Jackson have accidentally killed himself?

Anesthesiologist Dr. Paul White testified for the defense Friday in the involuntary manslaughter trial of Dr. Conrad Murray and claimed that the fatal dose of propofol that killed the King of Pop in June 2009 was most likely self-administered, TheWrap.com reports.

Dr. Conrad Murray's lawyer: Michael Jackson died instantaneously

His testimony attempts to counter the prosecution witness' argument from earlier in the month that Murray had used an infusion via IV drip to deliver propofol to Jackson and that the doctor had failed to notice when the singer stopped breathing. Not only did the infusion theory sound inconsistent with the level of propofol found in Jackson's body during the autopsy, but the IV drip setup found in his home didn't make sense either since no residual propofol was found in the bag or upper IV line and a clip to suspend the bottle from an IV rig made the whole drip setup unnecessary.

"It's befuddling to me," White testified. "Why would you go to all the hassle?" Instead, White agreed that it seemed likely Jackson had injected the fatal dose himself.

The prosecution will begin to cross-examine White on Monday, and closing arguments could happen as soon as Tuesday before the jury begins to deliberate.

If convicted, Murray could face up to four years in prison and the loss of his medical license.