Plus, Pine Bluff Arsenal is way on the other side of Little Rock, and would have likely affected hundreds of thousands of people in between the space between it and Beebe.
There's a nuclear power plant in Russellville that is 50 miles from Ozark where the fish were found, but Beebe is 125 miles away in delta land.
The birds could have likely dropped dead from some kind of pesticide used on crops in Lonoke (wheat and cotton crops for miles), or in the Beebe area.
The fact that it wasn't a mass poisoning of many types of birds and fish is the problem.
The dead fish overseas is likely poisoning, hence why so many different types were killed.
But for a bottom feeding Drum fish lying at the bottom of the Arkansas River doesn't make sense.