KNOX—A man who police say killed his friend at Thompsons Lake state campground a year ago in response to sexual advances faces over two decades in prison.

Stephen K. Murphy, 19, of 1030 Crane Street, Schenectady, was sentenced last Thursday to 21 years in prison and five years of post-release supervision. Murphy pleaded guilty on Sept. 21 to first-degree manslaughter. The sentencing was by Judge Joseph C. Teresi.

Murphy was arrested on Sept. 12, 2004 for the murder of Richard Agoney, 40, of Schenectady.

According to the Albany County Sheriff’s Department at the time of the arrest, after a night of drinking and smoking marijuana in a camper at a Thompsons Lake campsite, Agoney made sexual advances on Murphy. In the struggle that followed, Murphy stabbed Agoney and strangled him to death with a bungee cord, police say. Murphy then lit the camper on fire and drove away in Agoney’s truck, with Agoney’s wallet, police say.

The camper exploded when the fire reached the gas stove, police say.

According to the Albany County District Attorney’s Office, Murphy used Agoney’s money to purchase a number of items, including a train ticket to Florida.