A teller was arrested Monday, May 2 for her alleged role as a conspirator in the January armed robbery of Webster Bank's Main Street branch in New Milford.

This was the third arrest in the case.

Earlier, two roommates were charged in connection with the robbery and have pleaded not guilty to various robbery and conspiracy charges.

New Milford police Lt. Larry Ash said police issued a warrant Monday at 11:35 a.m. for Serena Viccaro, 21, of Heacock-Crossbrook Road.

She was charged with conspiracy to commit first-degree robbery, conspiracy to commit first-degree larceny, criminal liability for acts of another/first-degree robbery; and criminal liability for acts of another/first-degree larceny.

Ms. Viccaro was identified as the teller who turned over the $2,200 cash later recovered by police, Lt. Ash said. She was arrested at her home and released Monday afternoon after posting $25,000 bond.

She is scheduled to appear May 16 at state Superior Court in Bantam.

On Jan. 18, a man wearing a black ski mask, black gloves and a white Adidas sweatshirt -- later identified by police as Preston Hanlon, 27 -- went into the bank with what was described to police as a silver handgun and demanded the teller give him money, police said.

It was later learned that he had only a plastic air gun.

The teller handed over the cash, police said.

Mr. Hanlon then allegedly left the bank and boarded a Housatonic Area Regional Transit bus on Bridge Street that he rode to Route 7, where he got off and went to his apartment near the New Milford Block & Supply Co., police said.

He and his roommate, identified as Michael (Micah) Joel Thaisz, 24, then were engaged in a stand-off with police for about five hours before they surrendered, police said.

Mr. Hanlon is held on $250,000 bond on charges of first-degree robbery, first-degree larceny, conspiracy to commit first-degree robbery and conspiracy to commit first-degree larceny, according to police.

Mr. Thaisz admitted he had helped Mr. Hanlon plan the robbery, including supplying the fake gun and the clothes he wore, police said.

Mr. Thaisz, who remains free on bond, was charged with aiding and abetting a first-degree robbery and conspiracy to commit first-degree larceny.

Mr. Hanlon's case was recently postponed until July 6 to give him time to consider a plea bargain the state has offered him.

Mr. Thaisz's case was continued until June 3 so he also could consider a state plea offer.

The Federal Bureau of Investigation assisted New Milford police with the investigation.