WAUPACA, Wis. (AP) — Three Wisconsin men are charged after a homemade “cannon” exploded in Marion, killing an Illinois man last weekend. The three are charged in Waupaca County with homicide by negligent handling of explosives, a felony. Forty-two-year-old Kenneth Niemer of Clintonville, 37-year-old Robert Mattes of New London and 60-year-old Scott Mattes of Marion […]