How were the krays caught?

The Kray twins, notorious gangsters in London, were eventually caught and convicted in 1969 for the murders of George Cornell and Jack McVitie. The downfall of the Krays came about through a combination of police surveillance, witness testimonies, and the persistence of law enforcement agencies to bring them to justice. Their criminal activities, including violent acts and extortion, caught up with them, leading to their arrest and subsequent imprisonment.