Prosecutors said they will not attempt to try Robert Gursky, 50, on a breach of peace charge for handing a note to a teller at the TD Bank in Glastonbury Sept. 12 warning that a man with a gun was inside the institution, The Hartford (Conn.) Courant reported Thursday.
The teller did not read the note and only heard the man say the word "gun," police said.
Police determined the armed man was a state marshal doing business at the bank. Gursky, who left the bank after his attempt to warn the teller, was later arrested.
"It's no different than someone yelling 'Fire!' in a movie theater and then getting in his car and driving away," Glastonbury police spokesman James Kennedy said.
Police said Gursky should have instead called police from a safe place.
Gursky said he was relieved the charges were dropped.
"I was really surprised that they arrested me," he said.