Police in a northern Ontario city have turned to an emerging technology to try and solve a 19-year-old homicide.

It has been 42 years since seven-year-old Cheryl Hanson disappeared, but her family says they haven't given up hope.

Patrick Santos was murdered 10 years ago after being found bound, beaten and suffocated in his father's backyard in Toronto's east-end and police believe his killer is still out there.

Twenty-two year old Erin Gilmour was on the cusp of starting her adult life. She had her own apartment in Yorkville and was just breaking into the fashion industry, working at a high-end clothing boutique. But her life was unexpectedly cut short.

Diane Leroux has seen a lifetime pass and still has no answers around who killed her 16-year-old daughter, Yvonne Leroux.

Nine-year-old Christine Jessop went missing on Oct. 3, 1984 and her remains were discovered three months later in a rural part of Durham Region.

The death of 21-year-old Margaret McWilliam has remained a mystery to her family and Toronto police for almost 30 years.