Michael Jackson's doctor said Tuesday he will not testify in his own defense during his trial on a charge of involuntary manslaughter stemming from the 2009 death of the pop star.

Dr. Conrad Murray was asked by the trial judge whether he wanted to take the witness stand before the defense rested its case in the six-week trial in Los Angeles.

My decision is that I will not testify in this matter, judge, Murray said in court Tuesday.

Murray's attorneys told the judge they were resting their case Tuesday.

On October 25, attorneys for Murray had told the judge they had no plans for him to testify in his trial.

Murray denies involuntary manslaughter, or gross negligence, in the case and could face up to four years in prison if convicted.

Murray was at Jackson's side when the 50-year-old pop star was found not breathing at his rented Los Angeles mansion on June 25, 2009. He was later ruled to have died from an overdose of the powerful anesthetic propofol combined with sedatives.

Murray admits giving Jackson a small dose of propofol as a sleep aid, but his attorneys have sought to convince the jury that the singer somehow gave himself an extra dose of the drug, without Murray's knowledge, and thus killed himself.