PORTLAND — A Portland man was convicted at trial in federal court Thursday of armed bank robbery and conspiracy to commit bank robbery, including a Lewiston bank.

Neil West Sr., 65, was found guilty in U.S. District Court in Portland on both counts stemming from September robberies at University Credit Union in Portland and TD Bank in Lewiston. On a third charge, robbing and conspiracy to rob Norway Savings Bank in August, he was acquitted, according to a written statement by Assistant U.S. Attorney Michael Conley.

Co-conspirators Joseph Richards and Crystal Default committed the two robberies and West served as getaway driver, according to evidence at trial and court records, Conley said.

The TD Bank robbery resulted in a high-speed chase which ended in Saco with the arrests of West and Richards, Conley said.

West had been on federal supervised release stemming from a June 2013 conviction for accessory after-the-fact (bank robbery) for which he was given a 41-month prison sentence.

West faces up to 25 years in prison and a $250,000 fine on the robbery charges and up to five years in prison and a $250,000 fine on the conspiracy charges. He is expected to be sentenced after a presentence investigation report by the U.S. Probation Office.

On Jan. 20, Richards and Default pleaded guilty to armed bank robbery and conspiracy to commit bank robbery and await sentencing, Conley said.

A joint investigation included Lewiston Police Department and officers from that department were part of a Southern Maine Gang Task Force that worked on the probe.