Man fatally stabbed during argument in Sumter County Man fatal stabbed during argument in Sumter County By WIS News 10 Staff | February 28, 2021 at 10:34 AM EST - Updated February 28 at 11:11 AM SUMTER COUNTY, S.C. (WIS) - A woman and her son have been arrested following a fight that lead to the fatal stabbing of a man in Sumter County. The incident occurred shortly after 10:45 a.m. on the 400 block of N. Main Street. Witnesses say a man and a woman were arguing outside when the womanâs son got involved. As the two men were fighting the woman approached the victim and stabbed him.