Devil’s Island | Full Episode

An ex-Marine with a secret life and a secret wife. A five-year investigation turns on shocking DNA evidence — is the one-time hero a killer, too? "48 Hours"' Peter Van Sant has the latest in the case. Watch more full episodes of "48 Hours" on Pluto TV.

“Yvonne Baldelli disappeared from a tropical Panamanian island in 2011. The last person to see her alive was her ex-Marine boyfriend, Brian Brimager. I got involved in this fascinating investigation early on, with Yvonne’s family certain she’d been a victim of foul play. We’re with the family step-by-step as they discover that emails sent from Yvonne — allegedly from Panama — actually were sent from where Brian Brimager was now living in California. I confront him on camera in a supermarket parking lot.” — Peter Van Sant on why the story is important.

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True crime. Real justice. "48 Hours" investigates the most intriguing crime and justice cases that touch on all areas of the human experience including greed and passion. "48 Hours," which premiered in 1988, has developed a rich history of original reporting and impact journalism that has helped exonerate wrongly convicted people, caused cold cases to be reopened and solved, and along the way changed lives.

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