A New Hampshire man has entered a guilty plea for his involvement in the death of his father nearly two decades ago. Douglas Herlihy, now 40, was charged with manslaughter and attempted falsification of physical evidence in relation to the fatal beating of his father, Paul Herlihy, who was only 50 years old at the time of his death.
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The tragic incident, which has haunted the Herlihy family since it occurred in August 2003, saw Douglas, then just 17, fatally attack his father following a physical altercation. According to officials from the New Hampshire Department of Justice, Douglas confessed to striking Paul with a baseball bat, an item located near the family’s front door. This act led to the elder Herlihy’s death from blunt force trauma, as confirmed by the state medical examiner.
The circumstances surrounding Paul’s death were grim. Investigators discovered his body in the family kitchen, wrapped in a carpet and concealed under a blue tarp. The crime scene revealed extensive blood spatter across various surfaces, including the walls, ceiling, and refrigerator, underscoring the violent nature of the incident.
A probable cause affidavit indicated that the relationship between Douglas and his father was highly tumultuous, marked by instances of physical confrontations and violence. Law enforcement had reportedly responded multiple times to disputes within the Herlihy household between 2001 and 2003, both in Massachusetts and New Hampshire. According to the affidavit, Douglas had made a threatening comment to a friend, suggesting that if his father ever hit him again, it would be the last time.
In May 2025, investigative efforts resumed when police facilitated a recorded phone call between Douglas and his brother Andrew. During this conversation, Douglas claimed he had engaged with New Hampshire State Police investigators, asserting that they had corroborated his alibi. He maintained that police had accurately determined the timeframe of his father’s death, suggesting that he could not have been involved based on surveillance data from the area.
However, investigators noted discrepancies in Douglas’s account, stating that there was no evidence supporting his claims about police interviews or the alleged surveillance footage that might have exonerated him. Following his arrest in June 2025 in Saugus, Massachusetts, Douglas was extradited back to New Hampshire to face charges for the tragic events of 2003.
Originally charged with second-degree murder, Douglas ultimately pleaded guilty to manslaughter and attempted evidence tampering. The plea agreement sets forth a potential prison sentence of 12 to 24 years for the manslaughter charge, alongside an additional three and a half to seven years for attempting to falsify physical evidence.
New Hampshire Attorney General John M. Formella spoke about the case following the plea, highlighting the importance of justice, regardless of the elapsed time since the crime. He commended the Cold Case Unit and law enforcement for their relentless dedication in seeking truth and accountability, even years after the crime occurred.
A sentencing hearing for Douglas Herlihy is scheduled for early 2027, marking another chapter in a case that underscores the ongoing struggle with familial violence and the quest for closure for the victims and their loved ones.