
This episode discusses the investigation of Brian Dripps, focusing on the collection of biological evidence, specifically DNA from cigarette butts. Key moments include the initial failure to collect the right sample and the eventual success in confirming a match with evidence from a crime scene.
The detectives developed a profile on Dripps, analyzing his daily routine to find opportunities for DNA collection. Their first attempt involved waiting for him to discard a cigarette butt, but they were unable to identify which one was his due to multiple butts on the ground.
After a period of surveillance, the team successfully collected another cigarette butt when Dripps discarded it. This time, they ensured it was the correct sample and sent it to the state lab.
The lab confirmed that the DNA matched the biological evidence found at the crime scene, marking a significant breakthrough in the investigation.
Detectives successfully collect DNA from Brian Dripps' cigarette butts, confirming a match with crime scene evidence.

Success isn't as great unless you taste a little bit of defeat.How police collected a suspected killer’s DNA without him knowing