6 – Boston Art Robbers
On March 1990, two thieves disguised as Boston police officers entered into the Isabella Stewart Gardner Museum, tied up two watchmen and stole 13 priceless artworks.
The FBI believed that the suspects were members of a criminal organization based in the Mid-Atlantic States and New England. Stolen artworks included paintings by Rembrandt, Vermeer and other very popular artists.
The heist was known as the largest art robbery in history. Till date, the Boston Art Robbers still remain at large.