In the surveillance footage from the bank, the man attempting to rob the place is seen wearing a baseball-style cap with a white towel under it, dark glasses, gloves — and a uniform-type shirt with a telltale emblem on the sleeve.

Now, Nassau County detectives are trying to identify that emblem, believing it will lead to the suspect who they said tried to rob the TD Bank branch Tuesday in Massapequa.

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The attempted robbery occurred at the bank on Merrick Road at 4:05 p.m., police said. The man entered, approached the manager and produced a demand note, police said. The manager told the would-be robber she was not a teller — and didn’t have money. The suspect then fled the bank empty-handed, police said.

Police said there were seven employees and one customer in the bank at the time. No one was injured.

The suspect is described as being in his 20s, average to above average height with a thin build and light brown hair, though police said he wore a white towel under the black cap. He also wore a tan short-sleeved work shirt with the emblems on the sleeves and tan pants. Police said it was unclear whether the outfit was a uniform the man used while working.

Police are hoping the public will recognize the shirt-sleeve emblem or the suspect and call Crime Stoppers at 800-244-8477. All calls will remain confidential. Callers are eligible for a cash reward for information leading to an arrest.