Update at 4:30 p.m.
Thomas W. Wingfield, 33, also has been charged with unlawful use of a weapon, a Class E felony, in St. Charles County.
Previous story at 12 p.m.: A Union man has been charged with felony possession of a controlled substance after an investigation that resulted in the closure of school for the Washington School District Thursday.
Thomas W. Wingfield, 33, has been charged with possessing marijuana at his Union residence.
According to the probable cause statement filed in the Franklin County Prosecutor's Office by the Multi-County Narcotics and Violent Crimes Enforcement Unit (MCNVCEU), the drugs were found during an investigation by police.
The probable cause statement said Wingfield was being investigated following an incident on Interstate 70 in St. Peters early Thursday morning.
Police were investigating a report of a man flourishing a gun at a stranded motorist on the interstate. O'Fallon police located Wingfield at a convenience store and seized a handgun from him, according to the statement.
Wingfield also was place under arrest for misdemeanor stealing from the store. He is in custody in O'Fallon, authorities said.
A witness who was with Wingfield prior to his arrest told police Wingfield had recently been suspended from his job at the Washington School District, according to police.
Police said Wingfield had attempted to purchase an additional handgun and 500 more rounds, but was denied. The witness also told police Wingfield had made statements about "a lot of shooting at 7 a.m." Thursday.
Union police searched Wingfield's residence and located more than 35 grams of marijuana and two boxes for rifles recently purchased by Wingfield.
The Washington School District said Wingfield was placed on administrative paid leave Wednesday afternoon. The district said he was a non-certified employee.
Previous story: The Washington Police Department are investigating an incident involving an employee of the Washington School District.
According to a press release, police said "the employee has made no direct or indirect threats to students or staff of the district. The incident with the employee occurred off campus. However, the behavior and statements made by the employee recently were concerning and needed to be investigated."
Police have been working with the school district and the Franklin County Sheriff’s Department.
Police said the employee is in custody on unrelated charges. Police said the investigation is still active.
The Washington School District announced it would be closed Thursday, March 8.
Washington police are reportedly investigating a situation.
The full message from the school says: "We regret to inform you that the School District of Washington will be closed today (March 8) due to a situation that is currently being investigated by the Washington Police Department. Although there isn't any threat to our schools, more time is needed to analyze this concern."
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