The court previously heard that Low - who worked with Campbell on the town's Edradynate Estate - wasfound the following morning by a man who knew him while he was out walking.

Campbell, 77, denies murdering Low by shooting him and has lodged a special defence of alibi.

Police initiallyassessed the death as "non-suspicious" and a "death report" was submitted on that basis.

Giving evidence on the ninth day of the trial at the High Court in Glasgow, Dr Tamara McNamee, a consultant histopathologist, said she was initially asked to conduct a single-doctor autopsy on Low.

The doctor told the court that the initial report into Low's death had been non-suspicious.

She said: "On initially opening the body bag I saw a shot in the bag beside his remains and a few injuries to his face.

"I realised it was not a non-suspicious death and it was not a medical death."

McNamee said she escalated the matter, resulting in a two-doctor autopsy of Low's body.

Jurors heard that Low suffered injuries to his chest, right upper arm, left upper arm, neck and face.

His cause of death was stated to be "shotgun wound to neck and chest."

The witness further stated that Low had shotgun pellets in his right lung which resulted in bruising.

Low was also believed to have swallowed a blood clot from his nose or mouth.

When asked how quick the death could have occurred, McNamee said it could vary.

Prosecutor Greg Farrell asked: "It's not instantaneous, but death would result from this shotgun blast in seconds or minutes?," to which the doctor agreed.

McNamee later stated that Low was "face on" when he was shot.

She further claimed that Low's death would have occurred around eight to 16 hours before being discovered.

When asked by Farrell if there were several shotgun injuries, McNamee replied: "That's fair."

McNamee told the court that three major vessels in Low's neck had been hit, so surgeons would have been needed immediately to have given Low any chance of survival.

In cross examination, Campbell's KC Tony Lenehan put it to McNamee that times of death are "nothing like on TV?"

The witness replied: "Yes."

McNamee stated that times of death were better determined by witnesses, social media and banking activity.

Jurors were told previously that at 16:52 on 16 February, Low's phone activity had stopped.

Campbell, from Aberfeldy, is accused of murdering Low, having previously shown ill-will and malice toward him.

He is alleged to have disabled CCTV cameras at an address in Aberfeldy on the same day, in an attempt to conceal his whereabouts.

Campbell is also accused of attempting to defeat the ends of justice by disposing of the alleged murder weapon and an airgun, and having replacement tyres fitted on an electric bike between February and May 2024.

He is further accused of possessing an air rifle without a licence and discharging it on various occasions, and faces five charges of breach of the peace dating back to July 1995.

Campbell is alleged to have acted in a disorderly manner putting three men and two women in a "state of fear and alarm".

His legal team has lodged a special defence of alibi in connection with the murder accusation.

They say Campbell was not in Leafy Lane, where the body was found, at the time of the killing and was instead at home in Aberfeldy.

Campbell denies all the charges.

The trial before Lord Scott continues.