The suspect in a gunpoint carjacking yesterday who crashed a stolen vehicle first into a taxi and then into a tree was held on high bail for his Boston case and had his bail revoked on two unrelated cases in other jurisdictions, Suffolk County District Attorney Daniel F. Conley said today.

MICHAEL FITZPATRICK (D.O.B. 5/31/57) was arraigned today in the Boston Municipal Court on charges of carjacking, armed assault with intent to rob, unlawful possession of a firearm, and unlawful possession of ammunition. Assistant District Attorney Vincent DeMore recommended that he be held on $250,000 cash bail; Judge Mark Summerville set bail at $100,000 and revoked Fitzpatrick’s bail on open cases in Quincy and Orange district courts.

Prosecutors say Fitzpatrick approached a 31-year-old Arlington woman in a Clinton Street parking garage shortly after 1:00 yesterday afternoon and demanded the keys to her 2002 Acura MDX. He allegedly produced a gun along with his demand. The woman threw her keys past the assailant and ran from him.

Two other women in a different vehicle, both strangers to the victim, saw what was happening and told the victim to get into their vehicle. They drove away from the assailant and out of the garage at almost exactly the same time Fitzpatrick sped out, driving over an orange traffic cone in the process.

Moments later, the stolen vehicle struck a taxi cab near the intersection of North and Cross streets. The SUV sped away from that collision, nearly struck another cab on Commercial Street, and finally crashed into a tree in front of a skating rink near 600 Commercial Street.

A Boston Police officer working a paid detail in the area was approached by a witness who saw the final collision. That witness also told the officer that the driver was walking toward the boardwalk under the Charlestown Bridge.

That officer approached the suspect, later identified as Fitzpatrick, walking with his hands in his jacket pockets. The officer ordered him to stop and show his hands, which the suspect did not do.

At this time, Massachusetts State Police and additional Boston Police officers arrived on the scene and assisted in Fitzpatrick’s arrest. In the course of pat-frisking the suspect, the officers recovered a loaded .32 caliber revolver.

“We saw two very different types of people in this case,” Conley said. “One is the type who pulls a loaded gun on a woman and steals her car. The other is the type who rushes to help the victim, even though she was a stranger. As we work to keep the assailant off the streets and serve the victim in court, we won’t forget those good Samaritans’ kindness or bravery.”

Fitzpatrick was represented today by attorney Robert Proctor. He will return to court on March 22.