Walsh reacts as second top aide faces extortion charges

BOSTON — Boston Mayor Marty Walsh expressed concern Wednesday after the second top member of his administration was arrested on charges that he extorted a music festival, pressuring it to hire union workers. On Tuesday a federal grand jury indicted Tim Sullivan, Boston's chief of staff for intergovernmental relations and senior advisor for external relations, and the 36-year-old Dorchester resident was arrested Wednesday morning, according to federal prosecutors. He is due in federal court at 2

BOSTON — Boston Mayor Marty Walsh expressed concern Wednesday after the second top member of his administration was arrested on charges that he extorted a music festival, pressuring it to hire union workers. On Tuesday a federal grand jury indicted Tim Sullivan, Boston's chief of staff for intergovernmental relations and senior advisor for external relations, and the 36-year-old Dorchester resident was arrested Wednesday morning, according to federal prosecutors. He is due in federal court at 2…