Before authorities confirmed to ABC News that Murray was being sought for an interview, speculation swirled as to who might be the "personal physician" who was with Jackson at the time of his death.
Murray personally has been taken to civil court in Clark County twice in the past year by Capital One Bank for unpaid bills of around $2,000 in total.
The LAPD said it knew Jackson had several doctors.
For years, Jackson has been treated by Dr. Arnie Klein, a dermatologist. It was in Klein's office that Jackson met Debbie Rowe, the mother of his first two children. A housekeeper at Klein's homes said the doctor was "out of town."
The Web site TMZ.com reported the doctor lived at home with Jackson, but police could not confirm that. Paramedics were called to Jackson's rental home in the Holmby Hills neighborhood of Los Angeles Thursday afternoon. The singer was taken to UCLA, where according to his brother, doctors attempted to resuscitate him for over an hour.
Jackson is believed to have died as a result of cardiac arrest.