A Donna man has pleaded guilty to charges connected to a death in Weslaco. Thirty-five-year-old Travis Leon Trevino was arrested last December after the death of 41-year-old Isacc Martinez. Investigators say Trevino punched Martinez after an argument over his behavior toward a 15-year-old girl. Martinez died after he was taken to a hospital. Trevino pleaded guilty to a charge of manslaughter on Tuesday and will be sentenced on December 17th.