The Smithville Police Department placed a 19-year-old man under arrest Wednesday afternoon after finding him on the property of Smithville Elementary School with an air-soft gun.
Cody Daniel Harchenko faces charges of displaying a weapon on public property.
The story began Wednesday morning when an SES student reported seeing someone near school property wearing dark clothing possibly and carrying a gun.
The school was placed on lock-down for a brief period after the  report, but no such person was found.
City police said similar  report was given at about 2:15 p.m., and Corporal Travis Bryant was dispatched to the school to investigate.
Bryant said when he arrived he found Harchenko in a fenced area at the front of the school.
Police said he had what appeared to be a black pistol tucked in the waistband of his pants, but further study revealed that he was in possession of a realistic-looking air-soft pistol.
Police said they do not know for certain if Harchenko is the same person whose sighting led to the lock-down that morning.