Forever Knight.S2E04.Bad Blood

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.
S2E04 - Bad Blood
An Interpol detective comes to Toronto to help solve a string of murders in a local park, a detective whose detailed knowledge of vampires makes Nick uncomfortable.

Aka. Böses Blut (Bad Blood)

Guest Starring:
Cedric Smith (Liam O'Neal)

Cast:
Kimberly Huie (Bridget Hellman)
Sandi Ross (Grace Balthazar)
Earl Pastko (Miklos)
John Swindells (Father Hurley)
Todd William Schroeder (Karl)
Krista Bridges (Sharon)
Ken Ketter (Barber/The Ripper)
Theodora Farray (Raven Waitress)
Cliff Saunders (Irish Man)
John E. Campbell (Young O'Neal Boy)
Lelsey Kelly (Police Woman)
Bryan Renfro (Jogger)

Written by James Johnston
Directed by Allan Kroeker