A video surveillance system that a drug dealer had in his own UK home partly led to his downfall according to the Daily Mail. Police, suspecting a man's involvement in drugs, raided his home, finding CCTV recordings that implicated him in a large drug deal worth 38,000 pounds sterling. The man initially denied knowing anything about the drugs, but his home surveillance cameras apparently caught him "rummaging around the boot" (the boot is a quaint English term for what we'd call the trunk) where the drugs were in the car. The prosecutor's comment in the story: "His own CCTV was his undoing."
P.S. Thanks to security alarm monitoring firm Monitronics, via their Twitter account, for passing word of this story.