Alexandre Bissonnette watched videos of mass murders before Quebec City mosque attack, court hears

The man convicted of killing six men inside a Quebec City mosque on Jan. 29, 2017, spent hours searching online for videos and references tomass murders in the weeks before he gunned down the worshippers, it was revealed Friday at a court hearing.

Alexandre Bissonnette, 28, also entered online search termsfor mass murderer Dylann Roof 201 times between Jan. 1 and Jan. 29, 2017 the day of the attack. Roof killed nine people at a South Carolina church in 2015.

One week before the mosque attack, Bissonnette watched a video montage made fromthe shooting scenes in director Denis Villeneuve's 2009 drama Polytechnique a fictionalized account of the 1989 colePolytechnique massacre that left 14 women dead.

Crown prosecutor Thomas Jacques said Bissonnette also watched footage of the 1999 Columbine school shooting carried out by two students, who killed a dozen students and a teacher.

Friday's hearing before Quebec Superior Court JusticeFranoisHuot will help determine whether securitycamera footage from the mosque on the night of the attack should be released. A media consortium, comprised of sevendifferent media outlets including the CBC, is trying to have the footage made public.

The Crown is arguing to have the video remain under a strict publication ban.

Bissonnette pleaded guilty March 28 to six counts of first-degree murder, changing an earlier plea. He also apologized to victims and survivors, saying he was deeply sorry for the pain he caused and was ashamed of his actions.

Jacques is expected to present the video during the sentencing hearingfor Bissonnette next week.

Around a dozen people, including survivors of the attack, sat in the audience at Friday's hearing, some visibly disturbed by the possibility the video could be made public.

The president of the Quebec Islamic Cultural Centre, Boufeldja Benabdallah, testified that simply discussing the possibility that could happen had revived tensions and frustrations at the mosque.

Benabdallah said mosque memberswere shocked when they found out this request had been made.

"We were extremely saddened. We thought once again, if this goes forward, we will relive the atrocities of Jan. 29," he told the court today.

Copycat effect a concern

Earlier Friday, Jacques called an expert witness who testified that broadcasting the video, or portions of it, could be devastating for the families, the survivors and the population in general.

Dr. Ccile Rousseau, a pediatric psychiatrist and researcher who has worked for 30 years with victims of tortureand people with post-traumatic stress disorder, said seeing images of the night of the shootingor of Bissonnettecould revive anxiety and distress for those who witnessed the attack.

"This can rekindle [PTSD] symptoms, when they are in remission or fading out," Rousseau testified via videoconference from Montreal.

Rousseau also said making the video public could provoke a "copycat" effect.

"Is there reason to use the principle of precaution?" Rousseau asked. "I would say so,without a doubt."

Extremist groups could alsouse the video for recruiting and radicalizing youth, Rousseau said.

"Neo-nazis would be extremely happy to put a video like this online, which is a direct incentive to hate and Islamophobia," she said.

Another expert for the Crown, international security expertStphane Leman-Langlois, supported Rousseau'sargument when he testified.

"This is like candy for people who want to recruit," Leman-Langlois told the court.

It's the sort of video that could be used both by white supremacists or jihadist groups, he said.

"It has an incredible power of attraction."

Hearing resumes Tuesday

The lawyer representing the media consortium, Jean-Franois Ct, said he could not disclose the arguments in favour ofthe media's request before next Tuesday, when he'll present thosearguments incourt.

"There is a general principlethat exists:it's the publication of judicial debates and public access to these documents, and that's what we debated today," he said.