A sheriff’s deputy has been killed after an incident on Interstate 85 in Greenville County on Tuesday afternoon. Caption: WLOS. The exact sequence of events is still unclear and preliminary, according to the Greenville County Sheriff’s Office. Officials report a deputy initiated a traffic stop on I-85 near White Horse Road just before 3 p. m. Tuesday, Oct. 20. One person from a vehicle began fighting with deputies. The vehicle accelerated, then collided with a semi-truck.