MESQUITE (CBSDFW.COM) – A Mesquite Police Officer assigned to Horn High School accidentally discharged his handgun while inspecting it.

It happened in an office for School Resource Officers as he began to unload it.

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After removing the magazine, the officer failed to eject the round of ammunition from the chamber and accidentally discharged the handgun.

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One round of ammunition was fired, ricocheted off the concrete floor and disintegrated. No students or school faculty members were present or injured during this incident.

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The department is investigating the incident and the officer will be subject to internal discipline for his conduct.