
This episode covers the escape of Travis Duncan, the mysterious disappearance of Doreen Murphy, and a new theory about the Mona Lisa's identity.
In 1992, 19-year-old Travis Duncan escaped from Seminole County Jail with two other inmates, leading to a high-speed chase and a shootout with police. Duncan's subsequent disappearance raised questions about his fate, with authorities believing he may have murdered a camper.
Stephen Murphy's wife, Doreen, vanished in 1990, and despite his efforts to find her, police suspected him of her murder. Anonymous letters suggested he may have been involved, but he maintained his innocence.
A new theory about the Mona Lisa suggests that Leonardo da Vinci may have used himself as the model for the painting, based on computer analysis that revealed similarities between his self-portrait and the famous artwork.
The episode concludes with a teaser for upcoming mysteries, including a cowboy's murder and the fate of his missing girlfriend.
Travis Duncan escapes jail, Doreen Murphy disappears, and a theory suggests Leonardo da Vinci modeled the Mona Lisa after himself.

This episode stands out for the following:
Travis Duncan was a quiet young man, a good kid from a good family.Unsolved Mysteries with Robert Stack - Season 6, Episode 9 - Full Episode
This is something you expect to see in the movies.Unsolved Mysteries with Robert Stack - Season 6, Episode 9 - Full Episode
He was out to make the police act on it with urgency.Unsolved Mysteries with Robert Stack - Season 6, Episode 9 - Full Episode
Perhaps that is why she is smiling.Unsolved Mysteries with Robert Stack - Season 6, Episode 9 - Full Episode
I did not type any letters there police.Unsolved Mysteries with Robert Stack - Season 6, Episode 9 - Full Episode
I want to know that she is alive.Unsolved Mysteries with Robert Stack - Season 6, Episode 9 - Full Episode