I live in the small town I grew up in. Everyone is related by blood or marriage (and sometimes both, it’s Appalachia). You would be surprised what can be and is covered up, if someone is connected. Even in a few cases, murder. I bet if you went down there to Sumter County and talked to people of the right age, they know who did it. Very few secrets exist in that kind of place. Small towns aren’t Mayberry, but the police do outwardly seem to resemble Barney Fife on occasion. Look into things too carefully and you might lose your job, or worse. If I was driving around with a weapon with altered or removed serial numbers, I’d expect to do some time. Henry didn’t, and they lost the murder weapon to boot. Do you REALLY believe that LE could be THAT inept?