Photo: The Canadian Press. All rights reserved.

Luke Rocco Magnotta (left) watches proceedings at his first-degree murder trial in Montreal, Monday, Sept.29, 2014. THE CANADIAN PRESS/Mike McLaughlin

Luka Rocco Magnotta's first-degree murder trial has resumed with more testimony and photos from a Montreal crime-scene technician.

Caroline Simoneau was the first witness to take the stand on Monday after the judge and lawyers addressed the jurors.

This morning, she's going through evidence gathered by Ottawa police, where body parts were mailed by the accused.

The jury of eight women and six men will hear evidence over several weeks in connection with the slaying and dismemberment of Jun Lin in Montreal in May 2012.

The trial is expected to last betwen six and eight weeks and feature some 60 witnesses.

On Monday, Magnotta pleaded not guilty to the five charges against him, including first-degree murder.

Quebec Superior Court Justice Guy Cournoyer advised the jurors that Magnotta had admitted to committing the crimes and that their task would be to determine his state of mind at the time of the acts.

Magnotta's lawyer, Luc Leclair, told the court his client has been diagnosed with borderline personality disorder shortly before the slaying and that he suffered from schizophrenia.

The jurors also heard from Crown prosecutor Louis Bouthillier, who told them he will show evidence that Magnotta had been planning a murder for six months.

Magnotta, 32, is also charged with committing an indignity to a body; publishing obscene material; criminally harassing Prime Minister Stephen Harper and other members of Parliament; and mailing obscene and indecent material.