--A 19-year-old is accused of killing his social worker, 53-year-old Diruhi S. Mattian, in North Andover last night. The accused is now in the hospital recovering from stab wounds he gave himself. [ http://www.boston.com/news/local/breaking_news/2008/02/social_worker_i.html">Boston Globe] --A woman was found murdered in her Medfield home last night. The victim, 47-year-old Margaret Ninos, was a nurse at Beth Israel Deaconess Medical Center. She died of head injuries. Police are investigating, and she leaves behind a 7-year-old daughter.......