Canada is no stranger to notorious serial killers – think Clifford Olson, Paul Bernardo and Robert Picton. But a brand new W5 investigation reveals that there’s one specific place in Canada where serial killers could get away with murder.

According to W5’s Avery Haines, there’s a place where serial killers are able to operate mostly under the radar for decades, and that place is London, Ontario. Across the country there are cities that are considered test cities. For example, if a coffee company wants to try out a new coffee, they would test it in a city like London. This is also the case with serial killersthey view London as a test city to prey.

During the investigation, Avery travelled to the quaint University town to document a memorial to mark the 50th anniversary of the abduction and killing of 15-year-old Jackie English.

English went missing after she finished her shift at a diner and on her walk home was seen getting into a car. Her body was found later. Her investigation became a labyrinth of unexpected and gruesome discoveries, including the fact that Jackie’s unsolved murder is very likely the work of a serial killer. Avery’s team spoke with a former London police officer who now runs a cold case society out of Western University in London who says “even an 8 year old” could figure out that this story has striking similarities to other unsolved murders of children and young women.

In the upcoming episode, Murder City, Avery and her team track clues decades after her abduction. You can catch the episode on Saturday, January 18th at 7 p.m. ET.