Hamilton Police have made an arrest in connection with several bank robberies.
Investigators say 49-year-old Kenneth Crawford held up the Key Bank on Main Street around 11 a.m. Monday.
A short time later, a detective with the Butler County Sheriff's Office found Crawford at his home on Eck Road in Middletown.
Police have charged Crawford with Monday's robbery, as well as the robbery of the First Financial Bank on Main Street on July 31.
Investigators believe Crawford is also responsible for a bank robbery in Franklin last Friday.
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One worker with burning hands and two others were sent to hospitals after an envelope with a white powdery substance was found at the Warren County Health and Human Services building Monday.