Anastasia Nicolazzi

But as the investigation went on, Yvonne's family became more and more convinced that Mary Jo must have had something to do with this homicide. And all those calls and rumors that once seemed harmless, they now seemed more like warning signs of a coming disaster.

But as the investigation went on, Yvonne's family became more and more convinced that Mary Jo must have had something to do with this homicide. And all those calls and rumors that once seemed harmless, they now seemed more like warning signs of a coming disaster.

Julie thought the call sounded like it came from a payphone, another bit of lost technology from the past. But unfortunately, that would make tracing the call in 1985 nearly impossible.

Julie thought the call sounded like it came from a payphone, another bit of lost technology from the past. But unfortunately, that would make tracing the call in 1985 nearly impossible.

And unfortunately, that singular focus on finding the murder weapon, it had a devastating impact on the investigation.

And unfortunately, that singular focus on finding the murder weapon, it had a devastating impact on the investigation.

And without the gun or a witness who could ID, not to mention DNA or other strong physical evidence, prosecutors in 1985 were just not convinced that they had enough to charge Mary Jo Lundsman with Yvonne's murder.

And without the gun or a witness who could ID, not to mention DNA or other strong physical evidence, prosecutors in 1985 were just not convinced that they had enough to charge Mary Jo Lundsman with Yvonne's murder.

Despite their persistence in urging law enforcement to keep working on their mom's case and their strong suspicions that they knew who killed her, Yvonne's children were forced to carry on with their lives knowing their mother's killer had gone unpunished.

Despite their persistence in urging law enforcement to keep working on their mom's case and their strong suspicions that they knew who killed her, Yvonne's children were forced to carry on with their lives knowing their mother's killer had gone unpunished.

At least in their day-to-day, as best they could. But the loss of their mom and the unresolved questions surrounding her murder would have a deep and lasting impact on their family.

At least in their day-to-day, as best they could. But the loss of their mom and the unresolved questions surrounding her murder would have a deep and lasting impact on their family.

For nearly 40 years, the 1985 unsolved murder of Yvonne Menke hung like a dark cloud over St. Croix Falls, Wisconsin, and Yvonne's family.

For nearly 40 years, the 1985 unsolved murder of Yvonne Menke hung like a dark cloud over St. Croix Falls, Wisconsin, and Yvonne's family.

Incredibly, Mary Jo Luntzman was still living in the area. So imagine Mary Jo Luntzman's surprise when investigators phoned her at home. Here's a portion of that call.

Incredibly, Mary Jo Luntzman was still living in the area. So imagine Mary Jo Luntzman's surprise when investigators phoned her at home. Here's a portion of that call.

And you never know, right? Shake the tree and see if anything new falls out. But it was clear that the now 80-year-old Mary Jo was not ready to change her tune.

And you never know, right? Shake the tree and see if anything new falls out. But it was clear that the now 80-year-old Mary Jo was not ready to change her tune.

Thank you.

Thank you.