While I don't have any experience hunting in Missouri, I have experience with poachers in "rough areas". From personal experience this is what happens after LEO handles the situation:
1. Individuals are (hopefully) apprehended
2. Individuals are (hopefully) charged
3. Individuals (hopefully) show up for trial
4. Individuals are sentenced with virtually zero consequences for their actions.
In the most recent case that I was involved in the poachers were felons in possession of firearms, hunting without licenses, trespassing, killed and abandoned game animals(wanton waste). Their penalty- an additional few months of probation. No fines, no loss of hunting/fishing privileges, no jail time.
It's not right, but it happens especially with locals in local courts, with local judges who have little interest in making sure that justice is actually served.
In comparison, a friend of mine made an honest mistake (still his fault, no denying that he should have been more careful and made certain of his target) and shot a small half racked buck with about 5" of antler on one side of his head during an antlerless season. In Michigan (where I live) an "antlerless" deer used to be one with less than 3" of antler. So a tiny spike would qualify as an antlerless deer. Anyway, said friend ended up losing his rifle and paying 800.00 in fines plus court fees, plus losing hunting and fishing privileges for a few years.
It was a mistake, he wasn't trespassing, or committing any other crimes, nor did he have a history of criminal activity. However, the incident happened in a reasonably affluent area where game law violations (and other law violations) are taken seriously.
No retaliation from my friend obviously,
And I'm unaware of any retaliation from the first case I mentioned.
It just goes to show how things are handled differently in different areas. It's embarrassing, and it shouldn't be this way, but unfortunately it is.