Fernandina Beach police said a man under arrest in Kentucky is responsible for holding up a check-cashing business earlier this month and they are looking into a possible connection with a bomb threat called into Fernandina Beach High School about the same time.

Police believe it was Christon Crabtree who walked into the Advance America Cash Advance store on South 8th Street on crutches on Sept. 18, then pulled a gun on the clerks and ran behind the counter to grab money and force the employees into a bathroom.

Police said Crabtree sprayed the workers with a chemical, possibly a pepper spray, before running out of the business, leaving his crutches behind.

Police believe a bomb threat called in to Fernandina Beach High School just before the robbery may have been related.

Police said they received a tip last week that led them to identify Crabtree as the robber and learned he had left the area. Detectives learned that the FBI had arrested Crabtree on Sept. 21 for trespassing on the Fort Knox army base and interstate stalking.

Fernandina Beach police said they are working with the FBI trying to connect Crabtree to the bomb threat and whether the robbery was connected with the events at Fort Knox.

Crabtree was being held by the U.S. Marshal's Service in Kentucky without bond. The Nassau County armed robbery charge carries a $250,000 bond.