Inside the world's largest art heist when over $500M of paintings were stolen from a Boston museum

BOSTON (AP) — For decades, the 1990 theft of 13 artworks from the Isabella Stewart Gardner Museum — now valued at more than $500 million — has remained unsolved. It remains the largest art theft in history — far surpassing more recent museum thefts, including a daylight heist at the Louvre that involved far fewer works and was resolved more quickly. In 2013, the FBI said it knew who was responsible for the Boston museum heist but declined to name them, fueling speculation that persists today. A former FBI agent who led the investigation for more than two decades is now offering the first detailed account of how investigators reached that conclusion — and publicly identifying the men he believes were involved. In a new book, Geoff Kelly traces how the artworks moved through criminal networks, where violence took the lives of key suspects and witnesses, and challenges long-circulating theories by revisiting key details. The irony at the center is that Gardner's intention was for the museum to remain frozen in time, stipulating in her will that nothing in the Venetian palazzo-inspired building would be changed after her death. Gardner, who lived in the museum and died there in 1924, intended for the paintings, sculptures and architectural fragments to remain exactly as she had arranged. The empty gilded frames of the missing paintings still hang in the museum today — silent witnesses to what was taken. The art heistEarly on March 18, 1990, as Boston wound down from St. Patrick's Day celebrations, two men dressed as police officers arrived at the museum and convinced a security guard to let them in, violating protocol. The men handcuffed the guards in the basement and made their way to the museum's Dutch Room, where they cut Vermeer's "The Concert" and Rembrandt's "Christ in the Storm on the Sea of Galilee" from their frames, also taking works by Degas and Manet. They also took a Napoleonic eagle finial — a decorative metal piece of comparatively little value that investigators later found puzzling — and the museum's security videotapes. The museum offered a $5 million reward that they then doubled a decade later for information leading to the recovery of the works. Boston-area network of criminalsSome tips pointed to the Irish Republican Army and to Boston mob figures, including notorious crime boss Whitey Bulger. Kelly followed one lead to France, where he watched through binoculars as FBI agents, posing as wealthy intermediaries, lounged on a yacht — drinking champagne and eating strawberries — in an effort to draw out suspected Corsican mob figures. Closer to home, agents searched houses across New England, relying heavily on informants. A triple murderer known as "Meatball" who was terminally ill secretly recorded conversations with suspected associates in hopes of earning money for his family. But none of the tips led to the paintings. Violence complicates mattersIn the decades since the robbery, several people believed to have ties to the heist were killed, and another died under suspicious circumstances. Robert "Bobby" Donati, a Boston mob associate long suspected in the case, was found stabbed to death in 1991, his body left in the trunk of a car after his home had been ransacked. Years earlier, Donati has visited the Gardner with another known art thief, Myles Connor, to scope it out for a robbery and said that if he ever took the museum's Napoleonic finial, it would be his "calling card." Years later, a jeweler told investigators Donati tried to sell a finial from the Isabella Stewart Gardner Museum but backed off, saying it was "too hot." A separate line of evidence centered on George Reissfelder, who investigators believe owned the getaway car. Kelly tracked down Reissfelder's brother, a retired military officer who had initially not believed his brother was involved. He broke down after being shown Manet's "Chez Tortoni," saying he recognized it as a painting he himself hung above his brother's bed. Reissfelder later died under suspicious circumstances. When investigators searched his home, the painting was gone. Both men had ties to TRC Auto Electric, a Dorchester shop linked to Charles "Chuck" Merlino's crew. Investigation with limited resourcesThough investigators believed they knew who was responsible, they had a difficult time finding definitive proof. In its early stages, the FBI assigned a single agent to the case, which Kelly said slowed progress. "You have to keep in mind when you're talking about investigations, they come down to dollars and cents," Kelly said. It was "like pulling teeth" to secure resources. At the time, federal investigators in Boston were heavily focused on violent crime, drug trafficking and organized crime cases. Kelly said a decision to release surveillance footage despite investigators' objections became a lasting distraction. With no usable video from the night of the robbery, prosecutors released footage from the night before that showed a museum employee entering the building after his car broke down. Kelly said he objected to the theory that the employee was casing the museum, since that possibility had already been reviewed and dismissed. The footage fueled years of misplaced suspicion, since the man was later determined not to be involved. Theories about an inside job at the museumAmong the questions that linger is whether it was an inside job. In photos from that night, a museum guard is seen handcuffed in the basement, his head wrapped in duct tape. Investigators noted that shortly before the robbery, the guard opened a door against policy — one that faced the area where the thieves were later seen waiting — a move investigators considered highly unusual and suspicious. "It's the immutable laws of time and space," Kelly said. "I think that there was enough information back then that he could have been charged. Would it be enough to convict him? I don't know." By the time investigators examined those questions more closely, Kelly said, the statute of limitations had expired, leaving them with little leverage to compel cooperation. The museum guard, Rick Abath, denied any involvement in the theft. He died in 2024. The artworks that disappearedKelly personifies the missing artworks and describes them as "perfect fugitives." "They don't go to the doctor. They don't get stopped for speeding. They don't leave fingerprints," he said. "They can just disappear." Unlike human fugitives, he said, artworks can also be copied. Over the years, that has meant chasing down false leads — including paintings spotted in a Reno antique market, hanging in private homes and even one that appeared in an episode of the TV show "Monk." Because the works are so recognizable, it's nearly impossible to sell them publicly. "Stealing the artwork from the museum, that's the easy part," Kelly said. "Profiting from it, that's the difficult part." He imagines the paintings will surface one day — outliving those who carried out the heist. "I have no doubt they still exist," he said