25 years later, FBI still on case

It remains one of the most notorious art heists in modern U.S. history — notorious because the thieves made off with at least $500 million in art and because the case remains unsolved after 25 years.

On Thursday, the FBI renewed its call for help in resolving the burglary at the Isabella Stewart Gardner Museum in Boston. The FBI released previously unseen video footage captured by museum security cameras 24 hours before the heist, showing an automobile pull up next to a rear entrance of the museum. The FBI said the car matches the general description of a vehicle that was reported to have been parked outside the museum moments prior to the theft on March 18, 1990.

The video also shows an unidentified man exiting the automobile and then being allowed inside the museum, against museum policy, by a security guard, according to the FBI.

Two people dressed in Boston police uniforms entered the museum in the early morning and made off with 13 works of art, including pieces by Rembrandt, Vermeer, Degas and Manet. The FBI said the individuals were allowed to enter by telling the security guard at the watch desk that they were responding to a report of a disturbance within the compound.

The museum is offering a $5-million reward for information that leads to the recovery of all the stolen art in good condition, the FBI said.