One woman was killed and another was injured in a one vehicle crash Saturday morning  (2/15) in Keokuk County.  The Iowa State Patrol says 28-year-old Mallory Johnston of Fremont was killed when she lost control of the jeep she was driving on a snow-covered portion of Highway 23 near 310^th Street.  Johnston’s vehicle went off the side of the road, overturned and landed on its top.  A passenger, 21-year-old Madelynn Johnston of Oskaloosa, was taken to a Des Moines hospital with injuries.  The accident happened just before 9am Saturday.