Excelsior Springs School District officials are providing additional details after a firearm was discovered at Excelsior Springs High School, left in a backpack brought onto campus by an adult spectator during a recent wrestling tournament.Assistant Superintendent Scott Guilkey explained the backpack was left following a wrestling tournament held at the high school on Dec. 13. The adult spectator who brought the backpack onto campus was from a visiting school district.An Excelsior Springs staff member discovered the unattended backpack the morning after the event and immediately reported it to the school resource officer. Guilkey noted the officer responded by ensuring the building was secure before activities resumed.“The school resource officer swept the facility, ensuring the facility had been cleared and was safe for activities on Sunday,” stated Guilkey.Officials said the situation was resolved without incident and no students we...