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Authorities, surviving family disagreed on not guilty verdict Written By: Erik Kaufman | × The home of John Mathis, eight miles north of Mount Vernon, is pictured in this Republic file photo. The farm was the site of a triple homicide nearly 40 years ago. (Chris Huber/Republic) MOUNT VERNON, S.D. — It was an ugly scene at the Mathis farm outside of Mount Vernon Sept. 8, 1981. When police were called to the location that night, John W. Mathis was sitting on a bed in the metal shed he and his family were living in after a pair of fires had destroyed their home earlier in the ...

 E-Mail IMAGE: Georgia Tech researcher Jean C. Rivera-Rios obtains air samples from an office on the campus of the Georgia Institute of Technology. view more  Credit: John Toon, Georgia Tech If you're looking for an indoor space with a low level of particulate air pollution, a commercial airliner flying at cruising altitude may be your best option. A newly reported study of air quality in indoor spaces such as stores, restaurants, offices, public transportation -- and commercial jets -- shows aircraft cabins with the lowest levels of tiny aerosol particles. Conducted in July 2020, t...