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Riley Holmes

HAYWARD -- Prosecutors have declined to file charges against a 20-year-old man arrested alongside his twin brother last month in connection with a bank robbery in the city.

Wyatt Holmes, of Washington state, was arrested March 6 after police found him wandering the street near a U.S. Bank branch allegedly robbed by his brother just moments earlier.

Prosecutors charged Wyatt's twin, Riley Holmes, with second-degree robbery. Riley pleaded not guilty to the charge on March 25 and is due in court at the Hayward Hall of Justice for a pretrial hearing on Wednesday.

Police initially believed Wyatt was his brother's getaway driver, but prosecutors found insufficient evidence to charge him with a crime, according to Eamon O'Connor, a spokesman for the Alameda County District Attorney's Office.

Police did a double-take when they arrested the twins after the 1:30 p.m. robbery inside the bank at 31045 Mission Blvd.

Witnesses said a male suspect -- later identified as Riley Holmes -- entered the bank, announced a robbery and pointed a gun at a female teller. Investigators later determined the weapon was a BB gun.

The teller complied with the demands and the suspect ran from the bank with at least $739 in cash, police said.

At the scene, witnesses gave police a description of the armed suspect and officers spotted Riley Holmes -- a brown-eyed brunette with shaggy hair -- near the intersection of Prestwick Avenue and St. Andrews Street.

He told officers he was looking for his brother, who was driving a silver Honda Accord.

His brother, the brown-eyed, blonde-haired Wyatt Holmes, was stopped less than a mile away from the bank at Mission Boulevard and Garin Avenue and detained for questioning.

Police said he told officers that he and his brother were on a road trip, ran out of money and ended up panhandling in San Francisco.

According to a probable cause affidavit, police uncovered a large sum of money wrapped in a plastic bag and hidden in Riley Holmes' waistband.

Riley Holmes reportedly told officers his brother didn't know about the robbery.

Court papers also show he said he was sorry and that "the gun was fake."

"I didn't want to hurt anyone," he said.

If convicted of the felony charge, he faces anywhere from a minimum of probation up to five years in prison.

Anyone with information about the armed heist can call police at 510-293-7000 or submit an anonymous tip at 510-293-7197.

Contact Natalie Neysa Alund at 510-293-2469. Follow her at Twitter.com/nataliealund.