AP) — The embattled head of Massachusetts' child welfare agency resigned Tuesday under intense scrutiny of the department following the unrelated deaths of three children, with Gov. Deval Patrick saying it was impossible for her to continue in the job. Olga Roche's resignation comes after calls from top Democratic lawmakers — including Massachusetts House Speaker Robert DeLeo and Senate President Therese Murray — for Roche to be replaced as commissioner of the Department of Children and Families. http://news.yahoo.com/child-welfare-official-resigns-kids-deaths-132418215.html