A genetic genealogist traced a cold case murder back four centuries to a small village in southern Italy, ultimately identifying a man who had lived in the same Pennsylvania county as the victim for nearly half a century without ever drawing suspicion. On the evening of December 5, 1975, 19-year-old Lindy Sue Biechler was attacked inside her apartment at the Spring Manor complex in Manor Township, Lancaster County, Pennsylvania. She had returned home from grocery shopping after depositing a paycheck and was waiting for her husband, Phil, when the attack occurred. The assailant used two knives, one brought into the apartment and one taken from the kitchen.
Lindy was stabbed 19 times in the neck, chest, abdomen, and back. A dish towel was wrapped around the knife handle to conceal fingerprints. Signs of sexual assault were confirmed, and defensive wounds on her hands showed she had fought back. Her uncle and aunt discovered her body when they stopped by to exchange cooking recipes.
The knife was still embedded in her neck. Police were called that night, and a man’s footprint was found in the kitchen. The narrow time window of the attack suggested the killer knew Lindy’s schedule. Investigators interviewed about 300 people, formed a task force, and consulted outside criminologists, but no suspect emerged.
Phil Biechler was questioned and cleared. The only direct trace left by the killer was semen DNA collected from Lindy’s underwear. In 1975, this evidence could not be tested, but it was carefully stored. Decades later, when DNA testing became available, the sample was submitted to the national CODIS database.
There were no matches, indicating the killer had no criminal record. In 2019, the Lancaster County District Attorney’s Office formed a cold case unit and asked Parabon NanoLabs to create a predicted composite image from the crime scene DNA. The images were released publicly in September 2019, but no significant leads came in. The case remained the oldest unsolved cold case in county history.
Then, in April 2018, the arrest of Joseph James DeAngelo, the Golden State Killer, drew national attention to genetic genealogy, an investigative method that searches public genealogy databases for relatives of a suspect. In 2020, the cold case unit approached CeCe Moore, chief genetic genealogist at Parabon NanoLabs, who had helped solve hundreds of cold cases. Moore found that in this case, the DNA matches were extraordinarily distant, with common ancestors dating to the 17th or 18th century, three to four hundred years ago. Moore had to develop a new strategy, tracing the family tree back through centuries rather than decades.
She eventually identified a single common origin for all the matches: Gasperina, a small village in Calabria, southern Italy. From there, she traced forward through generations of migration to find which family with Gasperina roots had settled in Lancaster County. After narrowing the list by age and gender, one name stood out: David Sinopoli, 68, who lived in East Hempfield Township, not far from where Lindy was killed. Investigators confirmed that in 1975, Sinopoli had lived in the same four-unit building at Spring Manor as Lindy and Phil, just steps away from the victim.
Sinopoli had no criminal record, and his name had never appeared in any investigation file. Investigators did not approach him directly. Instead, they began surveillance and waited for him to discard an item carrying his DNA. On February 11, 2022, Sinopoli drank coffee at Philadelphia International Airport and threw the cup in the trash.
Investigators retrieved it. The DNA on the cup matched the semen DNA from Lindy’s underwear with a probability of approximately one in 10 trillion. A blood stain on her clothing provided further confirmation. On July 17, 2022, investigators arrested Sinopoli at his East Hempfield home.
The next day, District Attorney Heather Adams announced that the oldest cold case in Lancaster County history had been solved. She credited advances in DNA technology, saying that without them, she did not know if the case would ever have been solved. Sinopoli was held in jail awaiting trial for more than a year. On October 19, 2023, he pleaded guilty to third-degree murder, aggravated assault, and burglary.
In the courtroom, Assistant District Attorney Christine Wilson placed a photo of Lindy Sue Biechler next to the defendant’s seat. Wilson pointed at the photo and said, “These cases are never forgotten. Lindy Sue will never be forgotten. ” She added, “Look at her and the precious life you stole in 1975.
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Judge David Ashworth said the level of harm Sinopoli caused was incomprehensible and that the depravity of his actions could not be overstated. He noted that Sinopoli pleaded guilty only because he was caught, not out of remorse. Phil Biechler, who was 20 when he lost his wife, spoke directly to Sinopoli: “You took a huge part of my life and caused immeasurable suffering to so many people while others have had to live with the terrible consequences of the murder you committed. You got to live your life.
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When given the opportunity to speak, Sinopoli said only, “I want to apologize to everyone, including my wife. ” He offered no explanation for the murder or the 19 stab wounds. Judge Ashworth sentenced Sinopoli to 25 to 50 years in prison, the maximum that could be applied under Pennsylvania law in 1975. At age 69, this was effectively a life sentence.
He was also ordered to pay $25,210 in prosecution costs. Adams said after the sentencing that justice had finally been served for Lindy Sue Biechler, and that the sentence would be a well-deserved life sentence. Wilson noted that Sinopoli thought he had gotten away with it, but the persistence of many people over many years and advances in DNA technology had caught up with him. The case did not produce a law or a nonprofit named after Lindy.
But among those working on cold cases using genetic genealogy, it holds a special place because it was one of the hardest cases solved this way. CeCe Moore had to develop a method that had never existed before, tracing a family tree back four centuries from a lab in Lancaster County to a village in southern Italy, then following it forward through generations to find one man. That method has since become a tool for other cold cases. The case also left practical lessons.
In 1975 Lancaster County, many people did not lock their doors, which may have allowed the killer to enter. Investigators and safety experts have urged people to lock doors even in quiet neighborhoods, to be cautious with people in the same building, to let loved ones know their schedules, and to trust their instincts about uncomfortable situations. The case also demonstrated that DNA evidence does not disappear, even after decades.
Sinopoli will not walk out of prison for the rest of his life, while Phil Biechler and Lindy’s family continue living with what they lost.