50th wedding anniversary celebration ends in tragedy with fatal stabbing and beating.

A suspect has been arrested in the stabbing and beating deaths of a Boston-area couple celebrating their 50th wedding anniversary and the woman's 97-year-old mother. Christopher Ferguson, 41, pleaded not guilty to a murder charge in the death of Jill D'Amore, 73, along with two counts of assault and one count of burglary. Additional charges are expected in the deaths of Bruno D'Amore, who was 74, and Lucia Arpino, 97, after those autopsies are completed. The victims were discovered in a bedroom by a friend shortly after they failed to show up for 10 a.m. Mass on Sunday.