RCMP Sgt. Serge Larocque was the last of the Crown's 48 witnesses. (Mike Moynihan/CBC)

The jury in a triple murder trial in Calgary had another difficult day of testimony as a blood-splatter expert showed dozens of images of the crime scene on courtroom monitors.

Using the disturbing photos, Sgt. Serge Larocque of the RCMP crime lab in Edmonton walked the jury through the house in Medicine Hat, Alta., where the bodies of a couple and their son, 8, were found on April 8.

Larocque spent most of Thursday detailing hundreds of bloodstains found on the walls, doors and carpet throughout the four-level split.

He testified that the parents died in the basement area where they were attacked.

The boy was stabbed in the hallway outside his bedroom, and eventually made his way to his bed, where he died from a deep and wide cut across his neck, Larocque told the jury.

Jeremy Steinke, 25, is charged with first-degree murder in the deaths of his girlfriend's family.

Comparing the victims' injuries and the crime scene to clothing found with Steinke when he was arrested, Larocque concluded that the items were present at the crime scene.

He testified that the runners, jeans, mask and a hooded sweatshirt found with Steinke a day after the slayings had come into direct contact with the father and the son while they were bleeding.

Several members of the six-man, six-woman jury looked away as the images were shown on six monitors in the jury box.

Defence granted adjournment to Monday

The Crown, which called a total of 48 witnesses over nine days, wrapped up its case on Thursday after Larocque's testimony. The Crown is trying to prove that Steinke and his girlfriend, then 12, plotted to kill her family and then run away together.

Defence lawyer Alain Hepner had no comment after the Crown wrapped up its case against his client Thursday. (Mike Moynihan/CBC)

The girl, who was found guilty last year of three counts of first-degree murder, is serving a maximum 10-year sentence for young offenders.

Steinke's lawyer Alain Hepner asked for an adjournment until Monday to consider his defence strategy. Court of Queen's Bench Justice Adele Kent said she had concerns about such a delay in a jury trial but agreed to the request, given the severity of the charges.

Hepner would not comment after the proceedings, but Crown prosecutor Ramona Robins said the options for the defence are limited. The defence can begin calling witnesses, or not present any evidence, which would move the trial straight to final arguments, she said.

If convicted, Steinke faces a life sentence with a minimum of 25 years in prison.

With files from Bryan Labby, Scott Dippel