Prime Video drops gripping true crime doc, Chasing a Killer: Gary Allen, in UK and Ireland today (22 February).
Inside South Yorkshire’s Horrific Double Murder Case
This two-part series pulls no punches. It plunges into one of South Yorkshire’s darkest crimes, tracking the relentless hunt by South Yorkshire and Humberside Police for Gary Allen — the cold-blooded killer behind two brutal murders spanning over 20 years.
The Twisted Murders of Gary Allen
- In 1997, Allen murdered 29-year-old Samantha Class in Hull. Her body was dumped in the Humber estuary.
- Fast forward to 2018, he struck again — killing 38-year-old Alena Grlakova, a mother of four from Rotherham, leaving her body in Parkgate.
From Acquittal to Conviction: The Courtroom Drama
Allen was initially acquitted for Samantha’s murder. But prosecutors retried him under the double jeopardy law. Chasing a Killer exposes the gripping joint police investigation and courtroom battles that finally locked Allen away for both horrific crimes.
