Donna Walter Muller lived for family, her neighbors and friends said.
For her son, Richard, who had just earned his associate's degree and was planning to attend Temple.
And for her daughter, Heather Muller Kunf, and granddaughter, Kaitlyn, whom she and Heather took to Disney World before Christmas.
The family lived together in a rowhouse on Stevens Street in Lawncrest, where smiling graduation and baby photos line the staircase wall.
On Sunday afternoon, the Muller family home became a scene of tragedy when Donna Muller, 49, who worked at a patent office in Horsham, and, her son, Richard, 22, who worked as a cook in a nursing home, were found shot to death upstairs.
A police source said Heather Kunf, 29, found the bodies around 3:15 p.m. when she returned from an overnight stay at her boyfriend's house.
Both had been shot in the back of the head.
Kaitlyn was not in the house at the time, a police source said.
Neighbors heard screams first, then sirens.
John Downey, who lives two doors away, was sitting down to watch a football game when he heard the sirens.
"I don't know what to say," he said on his porch as crime-scene officers went in and out of the Mullers' house. "It's just a shame. They are nice people. They don't deserve this."
Investigators were still at the scene late Sunday. Police had yet to develop suspects or a motive, Chief Inspector Scott Small said. Police quickly ruled out the possibility that the deaths were a murder-suicide, Small said.
There were no signs of forced entry, he said. Police recovered spent shell casings from a semiautomatic handgun, but no weapon. It did not appear the house had been ransacked or robbed, the police source said.
Neighbors, including Downey's wife, told investigators they heard a disturbance outside the Muller house overnight Saturday.
Police had not yet determined what time the Mullers were killed, the police source said.
Copyright 2014 - The Philadelphia Inquirer
McClatchy-Tribune News Service
