A Wisconsin man who, along with two others, has been charged with murder after their homemade cannon exploded and killed a fourth man, has pleaded not guilty to the crime.
Kenneth Niemer, 42, is accused of building a makeshift cannon out of a 4-foot-long, half-inch-thick steel pipe, which was plugged at the bottom and then filled with various explosive material, including shotgun powder and paper towels, in late May, according to Fox 11.
Scott Mattes then dropped an aerosol can of WD-40 down the pipe, according to investigators. Robert Mattes then lit the fuse.
Paul Casperson was hit with a steel fragment which left a “penetrating” wound in his abdomen, killing him.
Casperson’s wife had two cellphone videos of the incident, including one that shows the fatal explosion, according to Fox 11.