Two people were killed Sunday afternoon when a motorcycle passed a stop sign and slammed, broadside, into a car in southern Brown County. Brown County sheriff's officials said the westbound motorcycle, operated by a 38-year-old Green Bay-area man, passed a stop sign at Dickinson and Park roads. It struck a southbound car driven by a 60-year-old man from Mount Pleasant, in southeastern Wisconsin. Both drivers were pronounced dead at the scene of the 3:26 p.m. crash. The motorcyclist was not wearing a helmet, Sheriff's Lt. Chris Knurr said in a news release. The crash scene is near Way-Morr Park and the Morrison Town Hall.