Nassau County District Attorney Anne T. Donnelly announced that a former Nassau County Probation Officer was sentenced today to jail time for his conviction of official misconduct and false filing charges related to a sexual relationship he engaged in with a probationer that he was supervising.
Matthew Albertson, 44, of Smithtown, pleaded guilty September 8, 2025, before Judge Robert Bogle to Offering a False Instrument for Filing in the First Degree (an E felony) and Official Misconduct (an A misdemeanor).
The defendant was sentenced today to six months in jail and five years of probation. NCDA recommended a sentence of one to three years in prison.
“Matthew Albertson engaged in a relationship with a warped power dynamic, holding his probationer’s future in his hands and ignoring all of the policies and procedures meant to protect probationers, officers, and the entire system,” said DA Donnelly. “His betrayal of his sworn duty harmed the progress of the probationer he was assigned to monitor and support, and unfairly damages the reputation of probation officers who bring professionalism and dedication to their positions every day in Nassau County.”
DA Donnelly said that, in August 2023, an attorney for the female probationer reported to county authorities that the defendant, a Nassau County Probation Officer, had engaged in a sexual relationship with the woman while she was under his supervision. The attorney provided screenshots of text messages and other supporting documentation alleging that the relationship began in approximately November 2021 and continued through at least March 2022.
NCDA opened an investigation into the allegations.
The investigation revealed that on at least nine separate occasions between January 2022 and August 2023 Albertson falsified case notes regarding drug tests, office visits, and home visits concerning the probationer.
The defendant made entries stating that the probationer had been drug tested at her home and at Probation, however the evidence revealed that no one from Probation had administered a drug test to her while she was being supervised by the defendant.
Albertson also made entries that a phone call check-in, home visits, and office visits were made on specific dates. Phone records, text messages between the defendant and probationer, and other evidence showed that these check-ins did not occur.
Further, the investigation showed that between December 2021 through March 2022, while supervising the probationer, the defendant engaged in a sexual relationship with the woman, including during a home visit, in violation of written Probation rules that prohibit intimate relationships between officers and their probationers.
Records also showed that on or about January 14, 2024, the defendant entered into a vehicle purchase contract and financial loan obligation with the probationer’s family member to purchase a car for the probationer in another violation of agency rules.
From December 22, 2021, through and including February 13, 2022, the defendant also gave the probationer money on at least 18 separate dates, totaling approximately $8,000, for a car rental, manicures, food, and other expenses.
In addition, on February 12, 2022, the probationer had told Albertson through text messages that she feared she was suffering from a fentanyl overdose. Albertson told the woman to stay awake, wake up her mother, and eat sugar, but did not seek medical assistance or emergency services for her.
After the incident, the defendant failed to report any drug use to Probation, and later filed a case note reporting that the probationer was doing well.
The defendant surrendered to NCDA Detective Investigators on September 25, 2024.
The case is being prosecuted by Pharmaceutical Diversion & Cybercrimes Unit Chief Heather Kalachman of the Organized Crime and Rackets Bureau and Senior Investigative Counsel Kathleen Swenson of the Public Corruption Bureau under the supervision of Public Corruption Bureau Chief Kristen Fexas and the overall supervision of the Executive Assistant District Attorney for the Investigations Division Rick Whelan. The defendant is represented by Lloyd Nadel, Esq.