Boston Police report arresting Nickoyan Wallace, on charges he gunned down Ivanildo Barros, 37, of Dorchester, at 590 Park St. in Dorchester shortly before noon on Friday. Read more.

Transit Police report they are looking for this guy for an attack on the Green Line stop at Park Street that ended with the victim's head slamming into the platform around 8 a.m. on May 1. Read more.

Transit Police report arresting a Medford man they say stared at a woman on a Green Line platform on Park Street, followed her onto a trolley, sat across from her and then "exposed his genitals and committed a lewd act." Read more.

Live Boston reports that shortly before 10:30 a.m., somebody in one car started shooting at somebody in another car on Park Street, near Claybourne Street, behind the Roxbury Prep middle school on Regina Road. No injuries, but plenty of spent shells at the scene, from which two cars fled at a high rate of speed.

Transit Police report two out-of-town visitors, one 17, the other 19, who came into Boston for "a day of leisure" on Monday had a fun day with a group of strangers they met on the Common - until the group led them into the Park Street T stop. Read more.

Transit Police report arresting Mozamel Abdul-Rahman, 32, for what they say was an unprovoked attack on an 84-year-old man on a Red Line platform at Park Street on Saturday. Read more.

The MBTA is blaming a "power problem" at Park Street for delays on the Green Line. Shortly before 8 a.m., Jed reported:

Just hit a big bump then saw sparks on the Green Line C Train. Track 2 disabled train.

At 8:25, he shows us how passengers got from the trolley to the station: Read more.

Ron Newman attended the first anti-war rally of the decade at Park Street today.

With the old year ticking down, a Green Line train composed of two of the brand-new trolleys died right at Park Street, where everybody could see it. Steve Timmins reports workers "separated train into two singles, trains now moving again after about 20 minutes."