(columbiatribune.com) - A Cooper County man hurt in a June 7 explosion at his home died Monday evening.
Cooper County Sheriff Jerry Wolfe said Earl Fredrich, 60, died at University Hospital. Fredrich was airlifted to the hospital after a homemade explosive device detonated unexpectedly outside his home on Speed Drive in rural Cooper County south of Boonville.
Fredrich was the longtime owner of Fredrich Electronics in Boonville, Wolfe said.
An investigation by the sheriff's department, the Missouri State Highway Patrol bomb squad and the State Fire Marshal's Office found the explosion was accidental, and there's no indication of criminal activity, Wolfe said.
"From everything that we've gathered â€¦ it looks like he had a hobby of building and playing with remote explosive devices," Wolfe said. It appeared Fredrich's device was "in the experimentation stage," he said.
Emergency officials early on thought the device might have been a target-shooting explosive, but Wolfe said that has now been ruled out. The apparatus was an explosive that's triggered remotely, he said.
"We're not satisfied we know exactly how this detonated, but it did detonate accidentally â€¦ prior to when he intended it to detonate," he said.
No one else was hurt in the blast, Wolfe said.
This article was published in the Wednesday, June 18, 2014 edition of the Columbia Daily Tribune with the headline "Man hurt by homemade explosive dies."