Decks featuring unsolved homicide and missing person cases, with photos, details and tip lines, distributed in jails and prisons.
Agencies report tips and some solved cases attributed to decks, though results vary and impact is hard to measure precisely.
Ask the investigating agency or the state programme whether the case could be considered for a future deck.
Some are genuine and others are motivated by benefits or grudges, so investigators corroborate them with independent evidence.
Agencies typically seek family consent and approved photographs, and families who prefer not to participate can decline.