From the FDLE website:
ABOUT THE DECKS...
The Cold Case Homicide card decks each profile 52 unsolved homicides and missing persons. There are hundreds of other cases that are not yet profiled. You might know something about these cases or you might have some information on cases not yet in these decks. You may think the information you have is not important or would not be helpful to the investigation. However, that information just might be the missing link that family members have been waiting years for that can solve their loved one’s case and bring closure to their family. The victims depicted in these decks are someone’s mother, father, sister, brother, wife, husband or child. If you have information about any of the cases in these decks, please call the number at the bottom of the card that the case appears on. If you have information about a case that does not appear on these decks, please call 800.226.8477.
http://www.fdle.state.fl.us/OSI/Unsolved/cards/Cards.htm