Where Do Fingerprints Come From?

Join executive producer Annie Paterno and director Jay Dahl on the set of Catching Killers to see how recreating an investigation is all about the details - right down to the clunky computers and office supplies.

In 1983, police in Leicestershire, England struggle to make their case - until they join forces with scientists, who are just discovering the potential of DNA profiling.

Identifying all of the skeletons found under Gacy's house will take years, but by reading the clues in the bones, forensic anthropologists can tell what kind of person the Killer Clown targeted.