Three law enforcement agencies in Macon County took part in a search for a man who allegedly was waiting outside La Plata High School Tuesday morning with a gun.  The La Plata Police department says they received a call just after 8:00 a.m.  Officers from the police department, Macon County Sheriff’s Department, and Missouri Highway Patrol were involved in the search.  19-year old Kevin Head, Junior was found a short time later at a convenience store.  He was arrested on charges of unlawful use of a weapon.  Head was released on a 15-hundred dollar bond.