A word of caution that some of the testimony below is of a very graphic nature.

An RCMP forensic investigator returned to the stand Friday as 19-year-old Devin Morningstar’s first-degree murder trial entered its third day at Moncton Provincial Court.

Morningstar is one of three accused of murdering 18-year-old Baylee Wylie, whose remains were found in a burned-out apartment in Moncton on Dec. 17, 2015.

Morningstar has pleaded not guilty to the charges.

Two other people - Marissa Shephard and Tyler Noel - are also facing first-degree murder and arson charges in Wylie’s death, but won't go to trial for at least another year.

On Thursday, Cpl. Patrick Gould presented some of the nearly 600 pictures taken as part of his investigation.

Justice John Walsh told the 12-member jury to 'steel themselves' as they were presented with the grim photos, which included photos of Wylie after his death.

Gould returned to the stand Friday morning, where he described a number of exhibits seized during his investigation, including a knife, screwdriver, rifle, broken glass bong, box cutter with a hooked edge, cleaning gloves and a bottle of cleaner.

Under cross examination from the defence, the RCMP officer told the court Morningstar’s fingerprints were not found on any of the exhibits.

On Friday, a forensic pathologist took the stand for several hours to list the dozens of injuries inflicted on Wylie’s body.

Dr. Ather Naseemuddin performed the autopsy and testified Wylie suffered more than 150 sharp and blunt force wounds, at least four of which would have been fatal.

The doctor told the court that wounds to the carotid artery, lungs, heart and liver could have caused death. He also noted second and third degree burns on Wylie's upper body.

Wylie's family has been present for the duration of the trial, but his mother left mid-way through the pathologist's testimony.

Morningstar’s trial is slated to last five weeks, and will continue on Monday.

With files from CTV Atlantic’s Cami Kepke.