AAn anonymous tip helped police catch a 25-year-old man who robbed a First Hawaiian Bank last month in Waikiki, federal court documents said.

Edward John Cimafranca has been charged with first-degree robbery and is being held without bail at the federal detention center, said FBI spokesman Tom Simon.

According to federal court documents, Cimafranca walked up to a teller at the Waikiki branch of First Hawaiian Bank about 4:15 p.m. on June 11. He gave the teller a note saying that he had a gun and wanted money, then fled with $516 in cash, the documents said.

On June 22, the Honolulu Police Department received a tip saying the suspect in the bank robbery, who goes by “John John,” was living with his brother on Kaiko Street in Ewa Beach.

After officers arrested Cimafranca at his home in Ewa Beach on Monday, he admitted to robbing the bank and identified himself in the surveillance videos, court documents said.

Cimafranca is scheduled to appear in U.S. District Court for a bail hearing on Tuesday.