David DiPaolo, 31, of Bristow, Va., is charged with manslaughter after police arrested him Jan. 8 near Glens Falls, N.Y. DiPaolo is accused of killing Geoffrey Farrar with a claw hammer.

A U.S. District judge sentenced a 34-year-old Bristow man to 10 years in prison Monday for the voluntary manslaughter of his rock climbing mentor in 2013, authorities said.

The man, David DiPaolo, pleaded guilty in February to killing Geoffrey Farrar, 69, at the Carderock Recreation Area in Bethesda following an altercation. DiPaolo, who had been Farrar’s mentee for 20 years, was also sentenced to three years of supervised release.

Investigators said that on Dec. 28, 2013, DiPaolo and Farrar got into an argument in the parking lot of Carderock, which lies within the Chesapeake and Ohio Canal National Historic Park.

After the argument, Farrar went to the base of a rock-climbing area and DiPaolo went back to his vehicle. However, a short time later, DiPaolo found Farrar and hit the 69-year-old multiple times in the head with a claw hammer, according to his plea agreement, a press release from the U.S. Attorney’s Office for the District of Maryland said.

Rock climbers found Farrar at the base of the rock face after the attack. Farrar, who suffered massive head trauma, was taken to an area hospital, where he later died from his injuries.

Authorities said DiPaolo drove to New York after the fatal altercation. He was arrested on Jan. 8, 2014.