A federal judge sentenced a retired Boston cop to 20 months in prison for using a chair to ram into a police officer chasing another rioter during the breach of the U.S. Capitol on Jan. 6, 2021, prosecutors said in a Friday statement.

Joseph Robert Fisher, 52, of Plymouth entered the Capitol just before 2:30 p.m. on Jan. 6, about ten minutes after rioters initially stormed the building while members of Congress were meeting inside to certify the results of the 2020 election, authorities said.

Fisher eventually made his way to the Capitol Visitor Center’s Orientation Lobby, where a “physical altercation” between rioters and United States Capitol Police officers had started. A cop started to chase a rioter who had sprayed a “chemical irritant” at other Capitol Police officers, according to prosecutors.

Fisher saw the chase “and moved to assist the rioter” by grabbing a chair, hiding behind a pillar and waiting “as the riot and officer approached his position,” according to prosecutors.

“Fisher chose his timing carefully, and just as the officer and a rioter ran by, Fisher rammed the chair into the officer, preventing the officer from apprehending the rioter. Fisher continued to assault the officer by grabbing and pushing the officer as another rioter hit and shoved the officer from behind,” the U.S. Attorney’s Office for the District of Columbia said.

Fisher left the Capitol around 2:42 p.m. and he was arrested on March, 2023 in Plymouth, according to prosecutors.

He was sentenced to 20 months in prison, two years of supervised release, and ordered to pay $2,000 in restitution. He pleaded guilty earlier this year to two felony charges of civil disorder and assaulting, resisting, or impeding certain officers.

Boston fire puts out blaze in Ted Williams Tunnel

Boston firefighters “quickly” extinguished two cars and eventually doused a third after fires broke out inside the Ted Williams Tunnel on Friday, the department said.

The three cars went up in flames after an “accident,” the department said. Two vehicles were extinguished quickly while the third, a hybrid, “took longer,” the Boston Fire Department said in a statement.

Boston firefighters extinguished three blazing cars Friday in the Ted Williams Tunnel. (Courtesy of Boston Fire Department)

Toyota slams into MBTA bus Friday

A Toyota blew through a stop sign Friday and slammed into an MBTA bus, according to the Transit Police Department.

No injuries were reported from bus passengers but the driver was taken to the hospital for chest pain, according to law enforcement. The driver was issued a “citation,” police said.