A former Nassau County probation officer pleaded guilty in court Monday to falsifying instruments and official misconduct after he allegedly entered a sexual relationship with a female probationer under his supervision.

Matthew Albertson, 43, of Smithtown, failed to report the woman used drugs while on probation, gave her thousands of dollars for personal use and co-signed a car loan with one of her relatives, Nassau County District Attorney Anne Donnelly said in a news release.

The district attorney’s office opened an investigation into Albertson after the female probationer’s attorney reported the sexual relationship — which violated rules barring intimate relationships between officers and probationers under their supervision — in August 2023, Donnelly said. Screenshots of text messag

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