Federal prosecutors charged a Registry of Motor Vehicles employee Wednesday with conspiracy to defraud the government, alleging that he produced false driver’s licenses while working at the Revere office. In its case against Alexander Brewer, 24, of Boston, the Justice Department alleges that from December 2011 to December 2012, he knowingly issued Massachusetts driver’s licenses to people who presented Puerto Rican identifications that did not belong to them. Brewer accepted legal Puerto Rican identification documents from people whom he knew to be falsely using someone else’s identity, a Justice Department statement said. Brewer faces a maximum penalty of five years in prison, three years’ probation, and a $250,000 fine.Todd Feathers can be reached at email@example.com. Follow him on Twitter at @ToddFeathers.