In early 2025, a limited series was released on Netflix called The Breakthrough. This 4 part series is based on a true story, set in Sweden, about a double murder, solved by a genetic genealogist analyzing DNA left by the criminal at the scene of the attacks.
Genealogy is merely touched on, but the real world ramifications of solving a crime, and the price paid by dedicated law enforcement, also play a part.
If you have Netflix, I encourage you to check it out. Also, do some internet searches to learn more about the true story.