The brother of a Boston activist who has worked to stop street crime has been fatally shot. The Boston Herald reports that Joao DePina said his brother, 29-year-old Michael DePina, was gunned down in Boston's Dorchester neighborhood on Friday night. Police said Michael DePina died after being shot at about 8:45 p.m. His death is the 24th homicide in Boston so far this year, compared with 19 during the same period last year. Joao DePina has worked as a field director for state Rep. Evandro Carvalho and has organized vigils for other homicide victims and taken part in peace marches.