Calgary, AB,

Looking for public assistance in unsolved cold case investigations

Together, the Calgary Police Service Homicide Unit and Missing Persons Team continue to actively investigate a mixture of cold case homicide and missing persons files that have yet to be solved.

Investigators have identified three specific cases that could be solved with help from the public, including the homicides of Colton CROWSHOE and Hussam ISMAIL, and the disappearance of Monique MATTAR.

No matter how much time has passed since an incident, we remain committed to finding closure for a victim’s family. As time passes, allegiances can change and people may recall details they haven’t yet talked to police about. People may assume we are aware of certain details but we encourage anyone who has information to contact us, regardless of how insignificant they think their information is.  We are hopeful that by re-circulating these cases, those who have information will come forward.

Staff Sergeant Sean Gregson of the CPS Homicide Unit

With each one of these cases, we believe that there are members of the public who may have information that could help investigators bring closure to the victim’s families.

Homicide of Colton CROWSHOE

On July 4, 2014, Colton James CROWSHOE, 18, went missing after leaving a house party in the Abbeydale area. On July 24, 2014, Colton’s body was found in a retention pond at 16 Avenue N.E. and Stoney Trail. Colton’s death was determined to be a homicide and our Homicide Unit began investigating. Numerous witnesses have been interviewed and investigators have received a number of tips that we continue to investigate.

Case #14280063/4163

Homicide of Hussam ISMAIL

On Feb. 23, 2017, police were called to the area of 12 Avenue N.E. and Centre Street N. for a report of a man who appeared to be in medical distress in his stopped vehicle. Upon arrival, officers found a vehicle with bullet holes in it and the deceased body of Hussam Ahmad ISMAIL, 31. His death was determined to be a homicide, and a composite sketch was released in the investigation.

Case #17075583/3394

Disappearance of Monique MATTAR

On April 20, 2009, Monique MATTAR, 44, went missing after last being seen in the northeast community of Greenview at around 5 p.m. Monique has never been located and Missing Person Team investigators are looking to speak with anyone who has information about her disappearance or movements after April 20, 2009. Monique is described as 5’6” tall, approximately 134 pounds, with brown eyes, black shoulder-length hair and a tribal tattoo on her lower back. 

Case # LG09256929/3299

These investigations will not be closed until they are solved. We know it has been tremendously difficult for the families of these victims who have continued to search for answers and we’re asking anyone with information, big or small, to come forward.

Staff Sergeant Sean Gregson of the CPS Homicide Unit

Anyone with information about any of these cases, is asked to contact police by calling 403-266-1234. Tips can also be submitted anonymously to Crime Stoppers through any of the following methods:

TALK: 1-800-222-8477


APP: P3 Tips