The suspect accused of stabbing a Pennsylvania State Police liquor enforcement agent to death along the Montour Trail last year has pleaded guilty, but mentally ill.

Anthony Quesen pleaded guilty Monday to the deadly stabbing of 44-year-old Benjamin Brallier, an off-duty Pennsylvania State Police liquor enforcement agent , who was out for a run along the Montour Trail last October.

Brallier was stabbed multiple times in the torso, the front, and the back, according to court paperwork.

Police said Quesen and Brallier did not know one another.

Anthony Quesen has pleaded guilty, but mentally ill in the deadly stabbing of Benjamin Brallier, an off-duty Pennsylvania State Police liquor enforcement agent. Allegheny County Jail

The year before the murder, Quesen was accused in an

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