CAUTION: GRAPHIC CONTENT MAY DISTURB SOME READERS

Jurors hearing Luka Rocco Magnotta's murder trial remained largely impassive this afternoon as they watched a graphic video depicting Jun Lin's corpse being dismembered.

Several jurors hid their faces or looked away while the video played. It does not show the actual killing, but does clearly show Lin with his throat slit.

Lin’s parents left the courtroom before the video was played.

The video shows the Chinese engineering student being stabbed repeatedly before he is dismembered. A severed arm is used by the assailant to masturbate.

Jurors also saw a small black and white dog chewing the Chinese student's torso.

The final images in the video were a number of still photos showing hacked body parts and Lin's severed head.

The 32-year-old Magnotta slouched and put his head down in the box as the video was played.

The judge overseeing the trial ordered a break in proceedings once the video had been shown.

Over the first dozen days of the trial, jurors were warned they would see graphic evidence.

Earlier in the day, the trial heard from the police officer who captured a so-called murder video from the Internet.

Nadine Paoliello says she was asked to download copies of the 10-minute, 22-second video that appeared under various titles, most notably "One Lunatic, One Ice Pick."

Paoliello offered a brief description of what she saw: a naked man strapped to a bed, a decapitated head and an individual cutting pieces of a body. At one point, a small dog is seen gnawed on the body, she said.

She said her tasks included tracking down who uploaded the video to a number of gore-related websites and finding out more about Magnotta, who had a prominent presence on social networks.

The 32-year-old Magnotta was charged with first-degree murder after Lin’s slaying and in Montreal in May 2012. He has admitted to the physical acts he's accused of but has pleaded not guilty by way of mental disorder.

He faces four other charges: criminally harassing Prime Minister Stephen Harper and other members of Parliament; mailing obscene and indecent material; committing an indignity to a body; and publishing obscene materials.

-- with files from CTV Montreal