Dr. Conrad Murray on trial in Michael Jackson death in Los Angeles

A medical record for Michael Jackson is projected on a screen as defense attorney Ed Chernoff questions witness Dr. Robert Waldman (not pictured), an addiction specialist, during the final stage of Dr. Conrad Murray's involuntary manslaughter trial in Los Angeles on October 27, 2011. Murray has pleaded not guilty and faces four years in prison and the loss of his medical licenses if convicted of involuntary manslaughter in Michael Jackson's death. UPI/Paul Buck/pool