Legal Question in Criminal Law in Missouri

Here, "civil offense" was a sloppy way to say that simple pot possession has been "decriminalized." Thus, roughly the equivalent of a minor traffic offense.

Perhaps you were charged under a municipal ordinance. I do not believe tha tthe term "civil offense" is correct or has any meaning. You need to hire an attorney to be sure that you do not take any conviction on this charge that might cause negative consequences for you in the future.