Unruh had been confined in a state psychiatric hospital since the killings, which became known as the "Walk of Death." Diagnosed as a paranoid schizophrenic, he confessed to the killings and was judged mentally competent but never tried for the Sept. 6, 1949, massacre.
Unruh, then a 28-year-old honorably discharged World War II combat veteran and pharmacy student, planned the killings for more than a year. He kept a meticulous journal on his intended victims.
He killed five men, five women and three children. Some Unruh knew and intentionally targeted; others were simply strangers he encountered on the street that morning.
A recluse who read the Bible and loved guns, he was convinced his neighbors were ridiculing him behind his back and plotting against him. He was also depressed about his homosexual liaisons in a Philadelphia movie theater.
"They have been making derogatory remarks about my character," Unruh would later tell authorities. What finally set him off was his discovery that someone had stolen the gate to his fence.
Unruh, armed with a war souvenir Luger and 33 rounds of ammunition, left the apartment he shared with his mother, Freda, in the blue-collar neighborhood.
With calm and deadly precision, the 6-foot Unruh, a tank gunner and expert marksman in the Army, carried out his execution plot in the neighborhood around 32nd Street and River Road. Neighbors screamed "crazy man" and scrambled for cover as bullets flew.
At a shoe repair shop, Unruh shot a cobbler in the head. Next door at a barber shop, he killed a 6-year-old boy on a hobbyhorse chair, and then the barber.
Next on Unruh's list was a tailor, but he had left his shop on an errand. So Unruh shot the man's bride of six weeks in the head as she begged for her life.
Along the way he fatally shot a man at the wheel of his car, two women in another car and a 3-year-old boy peeking out a window at his home. A 10-year-old boy was wounded and died the next day.
A terrified tavern owner managed to shoot Unruh in the thigh with a .38-caliber pistol from a second-story window, but he continued walking. He then shot one of his prime targets, an insurance salesman who had sold policies to the Unruh family.
Unruh then went to the apartment of a neighbor, who had complained that Unruh played loud music. While a boy hid in a clothes closet, Unruh fatally shot the boy's parents and his grandmother.
He left the apartment and wounded two others before returning to his own apartment. He surrendered after police pumped tear gas into the apartment.
He later told police he had spent the previous evening sitting through three showings of a double feature and had thought that actress Barbara Stanwyck was one of his hated neighbors.
Unruh provided a detailed account of his actions during the killings, and only at the end of the interrogation did authorities learn he had been wounded as well.
"Only occasionally excessive brightness of his dark eyes indicated that he was anything other than normal," New York Times reporter Meyer Berger wrote of the interrogation, in a 4,000-word account of the shootings for which he won a Pulitzer Prize for deadline writing.
He faced 13 counts of "willful and malicious slayings with malice aforethought" and three counts of "atrocious assault and battery." He was eventually pronounced insane and put in a unit for the criminally insane at Trenton Psychiatric Hospital.