No arrest has been made.
From an article:
Investigators say the relative was assisting a Plaza Towers Elementary teacher in repairing a computer at the school at 852 Southwest 11th Street in Moore over the weekend. The relative, who is licensed to carry the gun, told police he did not realize it had fallen out of his pocket until he saw reports on the news.
Police say the owner of the gun contacted them. No one has been arrested, but officers say they will turn their investigation over to the district attorney.
The elementary school was locked down Monday morning when a teacher found the gun on a chair in a classroom. All the students were taken to the school's cafeteria while police searched the building for other weapons.
No one was injured in the incident. Several parents arrived at the school and checked their children out for the day after the lockdown ended.