The name of the Sac City man who was killed in a Friday night head-on crash in Sac County has been released. Authorities say the car driven by 39-year-old Robert Tibbs Junior crossed the center line and hit a vehicle driven by 34-year-old Jennifer Reiling, also of Sac City. Tibbs’ car went into the ditch and rolled. He was partly ejected. Reiling and her 10-year-old son, Matthew Jansma, were pinned inside and had to be freed by rescue crews.