A man brutally murdered his co-worker, a Hudson Valley father of two, at work.

During the morning of February 3, 2014, at the New York City Department of Environmental Protection maintenance shop in Kingston, David Reese arrived to work with a loaded pistol and confronted a co-worker, Aaron Thomas, 33, at gunpoint.

Reese hit Thomas in the head with the gun and then fatally shot the father of two young children.

After the murder, Reese turned his pistol over to a DEP police officer and calmly announced he had shot a co-worker, according to the Ulster County District Attorney's Office.

During his trial, Reese said he wasn't guilty by reason of mental disease or defect defense.

A jury rejected both and convicted him of murder. In August 2015, He was sentenced to 25 years to life in prison.

Reese appealed the jury’s verdict saying it wasn't supported by legally sufficient evidence and was against the weight of the credible evidence. He also challenged the sentence imposed by Ulster County Court, arguing it was unduly harsh and excessive and argued that the court committed reversible error by failing to provide a justification charge, despite the fact that no request was ever made for such charge.

On Thursday, the Appellate Division, Third Department rejected all of Reese's arguments.

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