A scientist who was the star defense witness in the trial of Michael Jackson's doctor will be in court Wednesday to fight a threatened $1,000 fine for contempt.

Dr. Paul White is a pioneer in the use of the anesthetic propofol. He clashed with Superior Court Judge Michael Pastor over comments in and out of court during Dr. Conrad Murray's trial.

Pastor says White deliberately brought up banned information in his testimony.

Pastor is giving White a chance to appear Wednesday and explain why he should not be found in direct contempt of court and fined $1,000. A member of the trial defense team, Michael Flanagan, is representing him.

Murray is in jail awaiting sentencing for involuntary manslaughter in Jackson's death and is not required to attend the hearing.