Playing cards, used by inmates in jails for card games, are now being used to get help on cold cases. Each of the 52 playing cards contains information about a murder, a missing person or another unsolved crime. While this topic is not about card divination, I find it fascinating that cards are being used to generate information that would not otherwise be known. Read about it here. The article also shows that the rules concerning use of tarot and other cards in prison cells is not consistent across the prison system (see this post on the use of tarot cards as a religious item in a prison).