3. Jeremiah Merello McGee. The Fairview Heights police had their hands full with criminal masterminds this year. McGee also had a brilliant idea, that he would firebomb the Robert A. Young Federal Building. One fine day in April, he parked his car and headed toward the building. But wait! He forgot the bomb! He headed back toward his car, set the thing on fire and chucked it toward the building. There was an explosion. And then McGee was promptly arrested, because, unlike other great criminal masterminds, he'd neglected to do proper reconnaissance and had parked in full view of the building's guard shack.
2. A.P. Gambling is illegal in Crane, Missouri, as the gas station owner identified as A.P. clearly must have known. Nonetheless, he chose to install a pair of slot machines in his gas station...which happens to be right across the street from the office of Crane's chief of police. It's perhaps needless to say (though we'll say it anyway) that the casino did not last long.
And the dumbest criminal in St. Louis this year?