Unresolved 300 Million Dollar Art Heist Evidence Files

On the morning of March 18, 1990, Lyle Grindle, Security Director of Boston's Isabella Stewart Gardner Museum, discovers the museum was robbed. (Source: Kurtis Productions)

The thieves stole 13 irreplaceable works of art, including Vermeer's, "The Concert," which is worth at least $100 million. Rembrandt and Manet's works were stolen as well. The total value of the theft is $300 million. (Source: Isabella Stewart Gardner Museum)

Convicted art thief Myles Connor tells the FBI he knows who committed the theft. His tip leads to a dead end. (Source: The Boston Globe)

Seven years after the theft, the museum puts up a reward for $5 million. Boston Herald Reporter Tom Mashberg starts an investigation into the Gardner theft. The investigation leads him to convicted art thief Myles Connor and con man Billy Youngworth. (Source: Kurtis Productions)

Billy Youngworth, known con artist and associate of Myles Connor, tells Tom Mashberg he has access to the stolen artwork. Youngworth never provides proof that he's telling the truth. (Source: NBC News Archive)

Tom Mashberg receives an unexpected phone call that leads him a painting that looks like Rembrandt's "Storm on the Sea of Galilee," estimated at more than $50 million. (Source: Isabella Stewart Gardner Museum)

After 17 years, FBI Agent Geoffrey Kelly hopes to still find the culprits. (Source: Kurtis Productions)

Gardner Museum Director Anne Hawley decides to keep the empty frames hanging on the museum walls. She hopes the masterpieces are kept in good conditions and will be one day be returned. (Source: Kurtis Productions)