Yann Dazé, a forensic pathologist, testified he performed the autopsy over five days between June 1, 2012 and ending and July 5, 2012 and that meant he could not examine the body using his usual logical method.
Magnotta looked down at the ground from his position inside a glassed-in enclosure in the courtroom, listening to a translation of the testimony via a headset.
The court heard the remains were recovered from different locations and sent to the pathologist's lab over the course of a month.
He specified the body had suffered major trauma and was in an advanced state of decomposition.
Jun Lin’s torso was found on May 29, 2012 in a suitcase outside a Montreal apartment.
Luka Magnotta has pleaded not guilty to five charges, including the first-degree murder of 33-year-old Jun Lin, and mailing obscene material.
Dazé testified that the police showed him 10 photographs from the investigation. Officers told him remains were recovered from Ottawa, Vancouver and Montreal and that tools had been seized.
The autopsy report has been entered into evidence, however the conclusion has not yet been read in court.
Crown prosecutor Louis Bouthillier asked the pathologist if he had watched an online video that depicts some aspects of the killing.
Dazé responded he had not, not only because he did not want to taint his expertise while performing the autopsy, he also believes he sees enough “disgusting things” at work.
Magnotta has pleaded not guilty the charges, but has agreed to the facts of the case, including that he killed Lin.
His lawyer told the court that he intends to prove Magnotta was not criminally responsible for his actions because of mental illness. He said Magnotta suffers from schizophrenia.
Bouthillier told the court he will present evidence that shows Magnotta had documented a plan to kill someone six months before Lin's death.