WARNING: Details in this story may be disturbing
Multiple bloodletting events occurred within an Oshawa home on the night Ahmed Buttu was killed, jurors hearing a murder trial have been told.
Investigators found blood spatter and transferred blood stains throughout rooms in the Langford Street house following the killing in 2019, court has heard.
Testimony from Durham police Det. Trudy Bennett, a blood stain pattern expert, spanned three days during the ongoing trial of Mohammed Khan at the Oshawa courthouse this week. The officer offered extensive evidence about blood found in multiple locations in the house, including an upstairs computer room, the second-floor landing outside that room, and the kitchen, TV room and living room downstairs.
At one point, defense lawyer Michael Moon suggested the enormous amount of data gathered during the investigation was the result of the scene amounting to a “bloody mess.”
“There were a lot of rooms in this particular scene that had bloodletting,” Bennett replied. “It is challenging when you have this many patterns in proximity to each other.”
Khan, 18 at the time of the incident, has pleaded not guilty to first-degree murder in the death of the 21-year-old Buttu, who was found stabbed to death in the Langford Street home on the evening of Feb. 27, 2019. The Crown alleges Khan killed Buttu during the course of a robbery, during which he intended to steal cannabis.
Buttu sustained more than 20 stab wounds as well as blunt-force injuries, court has heard. Swabs taken by investigators and submitted for forensic testing indicated blood at the scene was Buttu’s.
During Bennett’s testimony, jurors viewed numerous pictures taken by police that showed blood spatter and transfer stains in the computer room upstairs, in the hallway and down the stairway to the ground floor. One area in which blood was concentrated was in a foyer near the front door, where numerous blood patterns were detected on the walls, door and floor, court heard.
Buttu’s body was found on the floor near the foyer, court has heard.
“This area was the scene of a dynamic bloodletting event,” Bennett commented.
Blood spatter is produced when force is applied to a liquid blood source, jurors heard. Transfer occurs when an object with blood on it comes into contact with a surface.
Earlier in the trial, jurors heard forensic testing indicated Buttu’s blood was also present on clothing Khan was wearing when he was arrested by police near the scene of the killing, and on objects, including knives and broken knife blades, found in his car.
The trial, before Superior Court Judge Jocelyn Speyer and a jury, continues in Oshawa.