Catching Killers

DNA profiling has redefined forensic investigation. Witness two landmark cases in the history of genetic profiling. As science evolves, the ability of genetic profiling to help solve homicides continues to grow.

Fingerprints have helped authorities save the Mona Lisa, catch the infamous criminal John Dillinger, and in 1892 bring its first killer to justice.

Illinois has played host to two of the most grisly murder cases of the last century. One involved the Sausage King of Chicago and the other the Killer Clown. Both cases were solved thanks to the victims' bones.

Explore two grisly murder cases, years apart, which appear to have little in common at first glance.

Join our investigation as scientists, detectives, and criminal historians trace the poisonous compounds and indispensable tools of crime fighting.

Grooves inside a gun barrel leave a distinctive mark on bullets, linking bullets to weapons and victims to killers.