
This episode covers the 1988 murder of Cathy Swartz in Three Rivers, Michigan, and the use of investigative genetic genealogy to solve the cold case. Nancy Grace discusses the brutal circumstances of Cathy’s death, her baby daughter found unharmed, and the initial investigation that led to a dead end.
Key discussions include the details of the crime scene, the victim's background, and the emotional impact on her family, particularly her fiancé Mike Warner and their daughter Courteney. The episode highlights the challenges faced by detectives as they struggled to identify a suspect over the years.
In 2022, the new police chief Scott Boling reopens the case, leading to a breakthrough with forensic genetic genealogy. The investigation narrows down to the Waters brothers, eventually identifying Robert Waters as the prime suspect.
Detectives travel to South Carolina to confront Waters, who initially cooperates but later becomes evasive. After obtaining a fingerprint match from the crime scene, Waters is arrested, but he dies by suicide in jail before any further information can be uncovered.
The episode concludes with reflections on the impact of Cathy’s murder on her family and community, and the advancements in forensic science that helped bring some closure to a long-unsolved case.
Cathy Swartz's 1988 murder is solved using genetic genealogy, leading to suspect Robert Waters, who dies by suicide before trial.

This episode stands out for the following:
Who in their right mind would do that to somebody?The Three Rivers Killer | Bloodline Detectives with Nancy Grace
It was just empty.The Three Rivers Killer | Bloodline Detectives with Nancy Grace
I could not imagine seeing the love of my life, how it's described.The Three Rivers Killer | Bloodline Detectives with Nancy Grace
We had a match that was between a third and fourth cousin level.The Three Rivers Killer | Bloodline Detectives with Nancy Grace
I don't think he deserves to be in heaven.The Three Rivers Killer | Bloodline Detectives with Nancy Grace
We're never really going to know why.The Three Rivers Killer | Bloodline Detectives with Nancy Grace