BRIDGETON, Mo. – A potential attack was thwarted when employees at a home improvement store became suspicious.
Police told KMOV that 44-year-old Douglas Herr bought a pipe at a Missouri Home Depot store on April 13.
Officers say Herr allegedly asked an employee at the Home Depot to cut the pipe into 7.5 inch sections with each end threaded for a cap.
At that point, the employee became suspicious and decided to call police.
Authorities say Herr lives in Illinois and was staying at a Super 8 motel at the time, so officers got a search warrant for his hotel room.
Once inside, KMOV reports that they found material for making a pipe bomb including 25 pounds of gunpowder, fuse wire and pipe end caps.
Herr is charged with unlawful possession, transport, manufacture, repair or sale of an illegal weapon.
Court documents show that Herr was supposed to be supervised by a mental health worker and subject to drug and alcohol treatment.