“In a quiet corner of west Wales, the countryside kept its secrets for years.”

In the 1980s and 1990s, Pembrokeshire was a place of farms, coastal paths, and roads that emptied after dark. Movement was familiar. Faces were known. A man who looked like he belonged rarely drew attention.

Then, across two decades, violence struck in isolated places — a farmhouse set back from the lane, a stretch of coastal path below the cliffs, an open field near a housing estate. The investigations ran separately. The answers never came.

Years later, items preserved for decades were examined again. What had once been silent began to speak — and old assumptions shifted.

This week, the Archive traces a case that unfolded slowly — where ordinary familiarity masked something far darker, and where time itself became part of the story.

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Court of Appeal (BAILII) — Appeal refusal judgment

Wilkins, Steve & Hill, Jonathan — The Pembrokeshire Murders: Catching the Bullseye Killer (2013)

Conviction & sentencing report

Background profile — Spot-the-Ball win, burglary history, lifestyle

Son’s testimony — “shotgun walks”, hidden possessions, photographs, gun barrel

CCRC review request (recent status)

The Guardian — early court coverage

The Guardian — convictions overview (technology breakthrough angle)

ITV News — True story explainer / timeline

ITV News — appeal/review coverage

Forensic Access — Angela Gallop / forensic involvement

Western Telegraph — trial archive hub

Western Telegraph — conviction review application

Crime and Investigation https://www.crimeandinvestigation.co.uk/article/john-william-cooper-the-bullseye-murderer 

Royal Television Society — Bullseye history & viewership

UK Game Shows — Bullseye format details

Huffington Post — case explainer tied to ITV drama

The Independent — The Pembrokeshire Murders: Where are John Cooper and his family now? https://www.independent.co.uk/arts-entertainment/tv/news/pembrokeshire-murders-john-cooper-wife-b1786770.html 

Wikipedia                                                https://en.wikipedia.org/wiki/John_Cooper_(serial_killer)