A Monroe County jury found Matthew Crothers guilty of voluntary manslaughter in the 2014 stabbing death of his brother, David Crothers.
Jury deliberation began midday Monday and the verdict was delivered Tuesday afternoon.
The attack took place at a home in the 5700 block of Locust Lane in Chestnuthill Township, but the criminal complaint lists an address for Crothers in central Florida.
State police responded to the Locust Lane home in June 2014 for the report of a stabbing. When troopers arrived, they found David. C. Crothers suffering from massive blood loss because of injuries to his right leg, according to court records.
Paramedics treated David Crothers, 19, who was unconscious and lost vital signs several times on his way to the Pocono Medical Center, according to records.
Authorities found Matthew Crothers covered in blood at a neighbor's home. Investigators said he admitted to being in a "physical altercation" with his brother and that he pulled a folding knife to intimidate him.
Matthew Crothers said he stabbed his brother in the leg once, according to court records. Investigators photographed a bite mark on Matthew Crothers' left forearm.
David Crothers died four days after the attack, and an autopsy revealed three lacerations along his right thigh, according to records. They ranged in length from one inch to eight inches and measured a half-inch to two inches deep.
The autopsy showed that David Crothers' femoral artery had been severed.
Matthew Crothers will be sentenced in October.