Evidence at the inquest of prisoner Michael Davidson continued this afternoon, recorded on a video camera.
The jury was sent home this morning as some of them were ill.
Dr David Hedley gave his evidence to camera for them to watch at a later point.
Although he had no direct interaction with Mr Davidson, Dr Hedley was the lead forensic medical examiner for the Isle of Man when the prisoner died in March 2012.
The doctor described the role and procedures involved in his job, including the prescription of medication for a detainee in police custody.
The court heard Mr Davidson was prescribed 60mg of Diazepam in one day whilst in the police cell, and the doctor said he wouldn’t personally prescribe this large amount.
Earlier in the inquest, the court heard Mr Davidson was prescribed methadone as an alternative to suboxone in prison, and the doctor again said he would never do this.
The inquest will hear further toxicology and pathology evidence tomorrow.