(September 26, 2019, 3:04 PM EDT) -- BILLINGS, Mont. — A federal judge in Montana on Sept. 13 denied a motion to dismiss a wrongful death chemical exposure case brought by a woman who contends that her son was killed when a hydraulic fracturing company negligently allowed him to work around toxic substances on a fracking well site (Mary L. Devera v. Exxon Mobil Corporation, No. 18-59, D. Mont., 2019 U.S. Dist. LEXIS 157000)....