This undated photo provided by the Montgomery County District Attorney's Office in Norristown, Pa., shows Richard O'Rourke of Warrington, Pa., a former senior analytical chemist for Merck & Co. charged with causing or risking catastrophe, theft, receiving stolen property and recklessly endangering another person. Prosecutors say O'Rourke stole potassium cyanide from a laboratory at the pharmaceutical firm to use for pest control at home, but poured it down a suburban Philadelphia storm drain Dec. 15, 2017, when he learned there was an investigation. (Montgomery County District Attorney's Office via AP)
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