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3 Wisconsin men charged in homemade cannon death

May 29, 2019

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 appeared in court Wednesday. Signature bonds of $25,000 were set for each man.

WLUK-TV reports the men were using a 4-foot-long (1.2 meters) steel pipe with a plug welded onto the bottom.

According to the complaint, after the first attempt to ignite the device failed, it exploded during the second try, sending a piece of shrapnel that killed 44-year-old Paul Casperson of Belvidere, Illinois, on Sunday night.

The complaint says the victim’s wife made two videos of the incident.

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This story corrects age of one defendant from 38 to 42 and another from 38 to 37.

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