A suspect, Christopher Ferguson, 41, of Newton, Mass., was arrested on Monday, more than a day after the couple and a relative were found stabbed to death at their home.
A couple celebrating their 50th anniversary were expected at Sunday Mass to renew their vows. Their family and friends waited, but the guests of honor never arrived. Instead, they and another family member were found slain in their home that morning in the suburban city of Newton, Mass., in what the authorities described as a seemingly random attack.
The bodies of the couple — Gilda D’Amore, 73, and Bruno D’Amore, 74 — were found with that of Ms. D’Amore’s mother, Lucia Arpino, 97, with “knife injuries and blunt force trauma” by a friend who had left the service to check what was delaying them, the Middlesex district attorney, Marian T. Ryan, said at a news conference on Monday evening.
The day before, as the authorities searched for the killer, Ms. Ryan had urged residents of the ordinarily quiet city less than 10 miles southwest of Boston to remain vigilant and lock their doors.
