MIAMI—Bernard Jean Ternus, the Frenchman charged for attempting to sell four works stolen at gunpoint last year from the Museum of Fine Arts in Nice, France, has pleaded guilty in U.S. court, the Guardian reports.

Ternus was recently arrested in Florida, where he lives, after ten alleged accomplices were arrested by the French police earlier last month. The four paintings — works by Monet, Jan Brueghel the Elder, and two by Alfred Sisley — were recovered.

Ternus has admitted to meeting with FBI agents and arranging the sale of the paintings. The price for the four was to be $4.7 million. He has also pleaded guilty to visa fraud, admitting that he concealed his criminal history in France to gain entry into the U.S. He may be sentenced to up to five years in prison and hundreds of thousands of dollars in fines, though he has offered to cooperate in exchange for a lighter sentence.