An effort to identify the remains of young men murdered by serial killer John Wayne Gacy in the 1970s has led to a break in an unrelated case. That of a previously unidentified teenager found shot to death in San Francisco 36 years ago.

Chicago police trying to identify a dismembered toddler found in a lagoon earlier this month have collected DNA from the relatives of children who have gone missing.

Investigators say three men seen in a video from a home near where a northern Illinois police officer was fatally shot were not involved in the slaying.

DNA has helped exonerate more than 300 people in the US. Among the most recent was Christopher Abernathy, freed last week from a northern Illinois prison where he served almost 30 years for rape and murder.  

Judge allows DNA testing in Savory murder case

Aug 6, 2013

A Peoria County judge is allowing new DNA technology to be used in a 36-year-old double murder case. Johnnie Lee Savory was convicted of a gruesome double-murder that happened when he was 14.