Transit Police are looking for a member of the criminal class who led them on a chase through the Green Line tunnel between Arlington and Boylston stations this afternoon.
The chase began around 12:30 p.m. when the man either mugged somebody or shoplifted something at the City Sports store on Boylston Street. He ran down Boylston to the Arlington T stop and got on an inbound trolley - only to discover he'd been followed by his victim, who got on the same car.
Alerted to the attack, Transit Police awaited the trolley at Boylston. But the miscreant, described as a white man in his 50s, wearing a face mask and a winter jacket, somehow jumped off the train before it pulled into the station.
Transit Police briefly considered hopping on an outbound trolley to try to catch up to him in the tunnel, but quickly got word that an emergency hatch that opens on one of the traffic islands in front of the Four Seasons was open.
However, police now think the Phantom of the Green Line may have actually stayed on the tracks, turned around, walked to Boylston and then calmly escaped up the stairs there.
Kristin Dziadul reports from an announcement her trolley driver made:
Sorry we're stopped, there's a delay. Apparently there's someone running up and down the rail way that shouldn't be there.