Dog fighting: How an IT mix-up led a BBC investigation to unmask one Europe's biggest dog fighting networks

BBC Spotlight went undercover to expose a secret network of international dog fighters.

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The people behind the illegal bloodsport carefully conceal their identities, fearful of arrest and prosecution.

However, one dog fighter's IT mix-up led an undercover BBC investigation to unmask some of those involved in "one of Europe's largest dog fighting networks".

The BBC has tracked fighting kennels to unlikely places in the UK – from a busy housing estate to the grounds of a stately home.

A simple mis-click from one member of a top-secret online dog fighting forum exposed the brutal reality of today's dog fighting.