That was one of many separate scandals. CIA has an airbase in Mena, which was used to retrofit turbo twin-prop aircraft so the pilots could drop baggage from the while in-flight. You can’t do that in the US according to FAA rules.
The aircraft fly out of Mena with weapons and supplies, then come back with cocaine. They didn’t land at Mena with the cocaine, but would drop the duffels with cocaine at remote locations for pre-planned pick-up.
Kevin Ives and Don Henry were just 2 kids who had seen suspicious deliveries like this at night, and thought they could go snatch one of the duffels and make off with the contents. The CIA DZ party was always in-position, so they seized the kids, beat them and bludgeoned them to death with rifles, then staged the bodies on the railroad tracks to look like an accident.
Clinton had an Egyptian State Medical Examiner who rubber-stamped all the suspicious deaths in the State at the time as “natural causes”, so everyone knew they were going to get away with it.