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Calgary police hoping for new clues in cold missing person, homicide cases

Calgary police are looking for the public’s help to unearth warm leads on cold cases.

The Calgary Police Homicide Unit and the Missing Persons Team are still pursuing information on three specific cases that could be solved with help from the public.

CPS Homicide Unit Staff Sergeant Sean Gregson said that no matter how much time passes, they try to find closure for victim families.  He said they’re hopeful that by recirculating the cases, people may be willing to come forward with information.

“No matter how much time has passed since an incident, we remain committed to finding closure for a victim’s family,” Gregson said in a prepared CPS media release.

“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.”


Case 1: Colton Crowshoe Homicide

On July 4, 2014, 18-year-old Colton James Crowshoe went missing after leaving an Abbeydale area house party.  Crowshoe’s body was found in a storm retention pond at 16 Avenue NE and Stoney Trail on July 24.

Calgary police determined this to be a homicide at the time.  They said numerous witnesses have been interviewed and investigators have received several tips.

Case 2: Hussam Ismail Homicide

Police were called to the area of 12 Avenue NE and Centre Street N on Feb. 23, 2017 after a man was reported in medical distress.

When officers arrived, they found a vehicle with bullet holes in it and Hussam Ahmad Ismail, 31, was killed.


Police said the death was a homicide. They later released a composite sketch of a suspect.

At the time, Calgary police said they didn’t believe it was a random incident and that it may have involved a home invasion at the victim’s home.


Case 3: Missing – Monique Mattar

Calgary police are looking for anyone with information on the disappearance of Monique Mattar, 44.

Mattar went missing after being last seen in the northeast community of Greenview on April 20, 2009.

Police are hoping to speak with anyone who may know more information about her movements on or before that date.  Monique is 5’6” tall, roughly 134 pounds, brown eyes, black shoulder-length hair and has a tribal tattoo on her lower back.

Police say they believe the public has information that could help them solve these cases.

Anyone with information can call Calgary police at 403-266-1234.