-- Richard "Pops" Picardi, Sr., a 76 year old cab dispatcher, was arrested Friday for dealing drugs from his Chelsea workplace. The Revere man was noted by police for his advanced age and his prosthetic leg. He faces charges that he sold the painkillers OxyContin, Roxicet and Percocet to undercover police agents over a period of about a month. [Herald; Globe]

-- Authorities say the South Boston fire that killed Acia Johnson, 14, and Sophia Johnson, 2, earlier this month was the result of foul play. A grand jury has convened, but authorities have not publicized the name of any suspect. [Globe]

-- A cell phone video of a brutal teenage fight led Holden police to arrest a 15-year-old Wachusett Regional High School student. WBZTV, always classy, has a link to the video. [WBZTV]

-- A Somerville prostitution ring based its operation on Cummings Street, authorities say. Three alleged prostitutes and two alleged pimps were picked up by a police sting. [Somerville Journal]

All charges alleged until proven under law.