![The Exchange show](https://d3dthqtvwic6y7.cloudfront.net/podcast-covers/000/053/906/small/the-exchange.png)
Summary: Two barrels. Four bodies. And the decades-long mystery that led to a serial killer. A podcast about a cold case that's changing how murders will be investigated forever. D.N.A testing was crucial in identifying the victims and finding the killer, and has become a powerful new tool for crime investigators and law enforcement. But should we be concerned about privacy issues?