Like many local students, Matthew de Grood got off work Monday night and headed out to celebrate the end of the semester at the University of Calgary.

But shortly after being welcomed into a Brentwood house party, de Grood would be strapped to a stretcher and under arrest, accused of fatally stabbing five others at the gathering — the worst mass killing in Calgary’s history.

"Everybody is so shocked right now. I saw his picture. At first I thought, ‘Oh, my God, maybe he’s the one who got hurt. Then I read underneath. My heart just dropped," said a former high school classmate of de Grood’s, who also knew him at U of C.

The victims — Lawrence Hong, Josh Hunter, Kaitlin Perras, Zackariah Rathwell and Jordan Segura — were, by all accounts, celebrating like everyone else when they became the subjects of an unprovoked attack just after 1 a.m. Tuesday.

Story continues below this liveblog with the latest from the team of Calgary Herald reporters and photographers covering the slayings and their impact.







Police Chief Rick Hanson said the victims were "targeted one by one" during a house party at 11 Butler Cres. N.W.

"These were all good kids. There’s no question about that. They did nothing wrong, and nothing that they did contributed to what happened to them," Hanson said.

Police have a suspect — the son of a well-regarded senior officer from their ranks — and the names of the victims quickly spread among grief-stricken family members, friends and classmates as Tuesday wore on.

But the question police have yet to answer is shared by the wider community as the investigation heads into its second day: why?

"It is natural to speculate when these types of events occur. We want to know what happened, who was involved and why the outcome was so horrific," Mayor Naheed Nenshi said in a statement posted to his Facebook page.

While the police have yet to specify a precise motive, they charged de Grood with five counts of first-degree murder — a charge that indicates evidence of planning and deliberation.

Two of the victims, Josh Hunter and Zackariah Rathwell, were members of a popular local band, Zackariah and the Prophets.

Hunter, 23, was also an accounting major at the University of Calgary’s Haskayne School of Business. Rathwell, 21, was a first-year student at the Alberta College of Art and Design.

"They were amazing, they were really creative and they inspired me," said Eric Grant, a friend of the bandmates who attended a candlelight vigil for all five victims at U of C on Tuesday night.

"Today has been the hardest day of my life."

Segura, 22, was a religious studies student at the University of Calgary. Perras was 23; Hong was 27.

Investigators were still trying to sort out if any of the victims lived at the rented house that hosted the party, but police said it was mainly a gathering of University of Calgary students celebrating Bermuda Shorts Day, a long-running tradition to mark the last day of classes.

"Our thoughts and condolences go out to the families who have lost their loved ones in this senseless tragedy. The university community has lost a part of its family, and this is a very difficult time for all of us," U of C president Elizabeth Cannon said.

Authorities confirmed de Grood also attended U of C. Friends posted congratulatory messages on de Grood’s Facebook page last December, when he announced he had been accepted into the faculty of law and would begin attending classes this fall.

A status update posted on de Grood’s Facebook profile Monday night, hours before the stabbings, read: "Dread and the fugitive mind — the world needs a hero."

The first phrase is the title of a song by the heavy metal band Megadeth; the second phrase is the name of the 2001 album it appeared on.

De Grood had worked a shift at the Crowfoot Safeway store prior to arriving at the party, and police have no evidence he was impaired by drugs or alcohol, but Hanson added that finding was preliminary.

Hanson said de Grood was an invited guest at the party and none of the witnesses questioned by police saw any kind of confrontation that hints at a motive behind the killing spree.

"Was there anything that precipitated the event? Was there something that anyone had done that could have been taken as an insult or an affront to this individual?

"And to the best of our knowledge right now, there’s nothing to indicate anything like that happened earlier in the day that led to this," Hanson said.

Multiple sources said the investigation is now focusing on de Grood’s mental state — though Hanson wouldn’t specifically comment on that avenue of investigation.

"At this point in time, it’s very preliminary and can’t say for sure," he said.

As investigators try to piece together the events that led up to the killings, detectives have also sought answers from de Grood’s parents.

His father, Insp. Doug de Grood, is 33-year veteran who has held several senior posts during his time with the police department.

"He’s heartbroken, as his wife is. He said, can you please pass on to the families our total and complete sorrow and condolences as to what happened," Hanson said.

"They’ve been incredibly co-operative with this investigation. They have told the investigators everything."