A 14-year-old girl was arrested in Maryland for allegedly pulling a knife during a caught-on-camera school lunchroom brawl. Video showed the girl drawing what authorities said was a large 8-to-10-inch kitchen knife during a fight inside the cafeteria at Thomas Johnson High School in Frederick, Maryland, on Friday. According to the Frederick County Sheriff's Office, School Resource Officer Deputy 1st Class Dustin Turner witnessed two girls fighting in the lunchroom and immediately intervened when one was seen holding the knife in a "threatening manner." Girl, 14, pulls large knife at Thomas Johnson High School in Frederick, Maryland. (Frederick County Sheriff's Office) The knife drops to the ground and the deputy and school administers helped detained the high school freshman.