The Mansion Murders of Byrd and Melanie Billings

As the execution of the crime was so flawless, investigators could not figure out why the perpetrators would have allowed the surveillance cameras to continue filming. The police suspect that there was one additional person connected to the robbery-turned-murder that bowed out from the operation, leaving the suspects' plan vulnerable. It seems impossible that, after all their planning, the perpetrators would not have known about the surveillance system, which had been described extensively in the news report on the Billings.

Surveillance video from the Billings home