When Gongaware warned Dr. Finkelstein, who the brief described as his "close friend, " not to become Jackson's "Dr. Nick, " he was "warning me, you know, don't get all infatuated where you start administering meds to a rock star and have the rock star overdose and die on you, " Dr. Finkelstein testified.

CNN: Elvis' ghost haunts Michael Jackson death trial

"Shortly after he joined the 'Dangerous' tour in 1993, Dr. Finkelstein was asked to treat Jackson for pain, " the Jackson filing said, referring to Dr. Stuart Finkelstein, a doctor on the 1993 tour.

CNN: Elvis' ghost haunts Michael Jackson death trial

Gongaware was there the whole time, in charge of tour logistics, aware of the various physicians present, and he discussed with Dr. Finkelstein Jackson's opiate problem.

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While Murray has said he would invoke his Fifth Amendment rights to avoid testifying as his criminal appeal is pending, Dr. Finkelstein is expected to take the stand.

CNN: Elvis' ghost haunts Michael Jackson death trial