A 19 year old Wexford County man has been killed and two others serious injured in a Barry County Car wreck. Police say it happened Wednesday morning at East State and M-66.  The teenager was in a Buick that ran a stop sign and rammed a elderly Nashville couples Chevy Silverado.  The 80 year old man and his 79 year old wife are in serious condition.  The 19 year old was not wearing a seatbelt.  Police have not shared his name yet.