If they tossed them over a bridge, either hang them from it, or toss them over and let them try to heal without medical attention.
You beat me to it. Exactly what I would recommend.
“If they tossed them over a bridge, either hang them from it, or toss them over and let them try to heal without medical attention.”
they tossed them from their truck going in the opposite direction of their victims ... large landscaping rocks hitting at a combined 120 mph ...
Break rhem on a wheel, disembowel them, then hang them.