11case filesUpdated Jul 18, 2026
Casepin holds 11 solved cases in Alberta. A solved case is one the record closes with a conviction or an equivalent legal finding; each file names who was convicted only where a court did.
SOLVEDListen11 Butler Crescent, Brentwood, Calgary, Alberta, Canada · 2014
On April 15, 2014, Matthew de Grood stabbed five young adults to death at a house party in the Brentwood neighbourhood of Calgary, Alberta. He was later found not criminally responsible on account of mental disorder.
SOLVEDListenEdmonton, Alberta, Canada · 2008
John Brian Altinger, a 38-year-old Edmonton resident, was lured through a fake dating profile and killed by filmmaker Mark Twitchell in October 2008. Twitchell was convicted of first-degree murder in April 2011.
Credit: Hwy43CC BY-SA 3.0SourceSOLVEDListenJames Roszko's farm near Rochfort Bridge, north of Mayerthorpe, Alberta · 2005
On March 3, 2005, James Roszko shot and killed four RCMP constables at his farm near Mayerthorpe, Alberta, before killing himself; two men who helped him return to the property later pleaded guilty to manslaughter.
Credit: WinterforceMedia WinterE229Public domainSourceSOLVEDListenHUB Mall, University of Alberta, Edmonton, Alberta, Canada · 2012
On June 15, 2012, security guard Travis Baumgartner shot four coworkers, killing three, at HUB Mall on the University of Alberta campus in Edmonton, then fled with the stolen armored truck and cash before being arrested at the U.S. border the next day.
SOLVEDListenEdmonton, Alberta, Canada · 2017
On September 30, 2017, Abdulahi Sharif rammed and stabbed an Edmonton police officer, then fled and struck four pedestrians with a rental truck during a police chase; all five victims survived, and Sharif was later convicted of eleven criminal offences but not charged with terrorism.
SOLVEDListenAlberta Highway 2, north of Claresholm, Alberta, Canada · 2011
On December 15, 2011, Derek Jensen rammed and opened fire on a vehicle on Alberta Highway 2 near Claresholm, killing his ex-girlfriend Tabitha Stepple and two members of the Lethbridge Bulls baseball team before killing himself.
SOLVEDListenPelly, Saskatchewan and Banff, Alberta, Canada · 1935
In October 1935, three Doukhobor men in RCMP custody killed a local constable and an RCMP officer near Pelly, Saskatchewan, then fled west, killing two more RCMP officers in a shootout in Banff, Alberta, before all three perpetrators were killed by law enforcement and a park warden.
The files run from 1935 to 2019. The 2010s hold the most, with 7 files. The oldest is 1935 killings of Royal Canadian Mounted Police officers, from 1935.
They are spread across 6 cities and towns; the most are in Edmonton (4) and Calgary (3). By type, the largest groups are murder and homicide cases (9), mass shooting cases (4) and domestic violence cases (3).
4 files of the 11 have coverage attached: 4 videos, podcasts and documentaries from 4 creators. That Chapter, Coffeehouse Crime and Crime Beat have covered the most of them.
Every file is written from cited sources and pinned where it happened, and every person named carries the legal status the record gives them. Families and anyone involved can request a correction from any file.
Whitecourt RCMP We Remember — Credit: Hwy43CC BY-SA 3.0Source
Hub Mall Breezeway University of Alberta Edmonton Alberta Canada 02-A — Credit: WinterforceMedia WinterE229Public domainSource
11. The count covers published files only and changes as new files clear review.
1935 killings of Royal Canadian Mounted Police officers, from 1935. Open the file
2014 Calgary stabbing, with 1 video, podcast or documentary linked from its file. Open the file
That Chapter (1 case), Coffeehouse Crime (1 case) and Crime Beat (1 case), among 4 creators in all.
Edmonton (4) and Calgary (3).
It rebuilds hourly from the published files; the newest file change here is dated Jul 18, 2026. A status changes only when the record behind it does.
