There is very little on this case on the forums. This was a couple who was involved in an insurance scam over a pleasure boat in Texas along with a life insurance scam in New Mexico. The episode aired in 1995 and they were captured in 1996.

The update at the end of the episode said that Mary Denny was returned to federal prison in Florida.

I did a search with the FCI bureau and couldn't find a "Mary Denny" who matched the woman, and nothing comes up under "Mary Denney." They both used many aliases (it was hard for the Feds to discover their true identities) and the episode wasn't completely clear as to if those were really their real names. There was a "Mary Denny" but her age and race along with release date (should be late 90s) were not matching the woman featured in the episode.

Does anyone have some concrete information on what became of these two? If so, please share - I'm just simply curious as to who these people really are. I could be misusing the search feature or missing information, if so I apologize.

The UM Wiki site only contained the same info as in the episode, but strangely had some details varying from the episode as well.

Curiosity is killing the cat :) so any help or clarification would be appreciated!

I ended up solving the mystery. Her name is actually Mary Dennie, not Denny. She was released in July 1996...