Forever Knight.S1E20.Fatal Mistake

Forever Knight is a 1992 - 1996 Canadian television series about Nick Knight (Geraint Wyn Davies), an 800-year-old vampire working as a police detective in modern-day Toronto, Ontario. Wracked with guilt for centuries of killing others, he seeks redemption by working as a homicide detective on the night shift while struggling to find a way to become human again.
S1E20 - Fatal Mistake
Forced to shoot a teenage burglar during a convenience store robbery, Capt. Stonetree has difficulties focusing at work. Nick's empathy runs deep, having been in a similar situation hundreds of years earlier.

Guest Starring:
Cynthia Belliveau [Alexandra]
David Stratton [Billy Soule]

Cast:
Conrad Coates
Linda Goranson
Ken James
Simon Reynolds
Sandi Ross [Grace]
Tony Perri
Jeff Wood

Written by Michael Sadowski
Directed by Don McCutcheon