By day the workplace is rational and efficient, but at night the same offices, hotels and restaurants become the domain of the supernatural and unexplained. Those who work the graveyard…

Investigators piece together murder mysteries and seek insight into the victims’ lives – and sometimes into their darkest secrets.

Every second of every day, millions of Americans are caught on CCTV. Most of them are honest citizens going about their everyday lives. But a few are guilty of unspeakable…