Los Angeles  - Michael Jackson's private doctor, Conrad Murray, made his first public statement since coming under suspicion in the King of Pop's death and vowed he had told the truth to police.

"I have done all I could do," Murray said in a one-minute video posted on YouTube. "I told the truth, and I have faith the truth will prevail."

The cardiologist is being investigated on possible involuntary manslaughter charges for his alleged administration to Jackson of Propofol, a drug normally only administered intravenously in hospital operating. Jackson died June 25.

In the video, Murray did not address Jackson's death, malpractice allegations or what he told police investigators. Instead, most of the video was spent thanking his patients and friends, something Murray said he could not do in person because he was afraid to return calls or e-mails "because of all that is going on." (dpa)