How an undercover sting at a Phoenix Chili's restaurant led to the capture of the canal killer

Cold case Detective Clark Schwartzkopf was working a double murder case from the early 1990s and had arranged to meet a person of interest at a Chili's restaurant in Phoenix, Arizona. The idea was to get the possible suspect's DNA so forensic investigators could determine if it matched male DNA found on the bodies of the two female victims, Angela Brosso and Melanie Bernas .

Those unsolved murders had become known as the canal murders because both women were attacked while taking bike rides along the city's distinctive canal paths.

It was Jan. 2, 2015, and Schwartzkopf was meeting with a guy named Bryan Patrick Miller. The detective had learned that Miller was something of a local celebrity. He liked to attend popular zombie walks and other festivals in Phoenix dressed as a character