Did Michael Jackson Voluntarily Drink a Deadly Sedative?

http://www.people.com/people/article/0,,20464371,00.html

According to anesthesiologist Dr. Barry Friedberg, who last month met with one of Murray's defense attorneys to be screened as a possible expert witness, Murray's lawyers will argue that "Jackson could have swallowed propofol" himself. (Monday is the deadline for both the defense and prosecution to present their witness list for the trial.)

Friedberg says there appears to be a small amount of evidence to support the defense's theory. For instance, he says there were traces of the drug in Jackson's digestive system, which could have gotten there from drinking the sedative.

However, he says, it's the doctor's responsibility to create a "safe environment" by carefully monitoring a patient's breathing.