Richard Hyde, a 34-year-old elementary school principal, was shot to death in his Moon Township, Pennsylvania home on December 3, 1977. About 1 a.m., while on the phone, he reportedly heard breaking glass, walked past a nightstand holding a loaded firearm, and was struck in the hallway by a 12-gauge shotgun blast that tore through his chest and abdomen. He staggered into the kitchen and collapsed, dying on the linoleum floor.

Donna Hyde, also 34, was in a bathroom off the hallway during the attack. She ran barefoot through snow and mud toward nearby houses but disappeared. The couple’s two daughters, ages 9 and 4, were found unharmed in the home the next morning; reports differ on whether they slept through the attack or hid in a closet. Donna’s body was found the following day about two miles from the house, face-up beneath a pine tree, clothed only in a sweater and one sock. Her pants and underwear were nearby. She had been bludgeoned to death with a blunt object, possibly a blackjack, and investigators determined she had not been sexually assaulted.

The Hydes were the 26th and 27th victims in a string of unsolved southwestern Pennsylvania killings from March 1976 through late 1977.

Did anyone who knew the Hydes or lived in Moon Township at the time see or hear anything unusual that night?