Twenty-five years after the rattling theft of masterpieces from the Isabella Stewart Gardner Museum in Boston, CBS News revisits the crime scene and the known suspects. Still missing are masterworks by Rembrandt, Vermeer and Manet, and more.

"These thieves definitely had inside information," says Gardner's security chief. 

Antiques dealer William Youngworth, Connecticut mobster Robert Gentile, the security guard in 1990 who let the theives in, and others are scrutinized in this segment.