DREXEL HILL, Penn. (WCAU) – Investigators say an 18-year-old exchange student accused of threatening to “shoot up” his Pennsylvania high school built his own 9 mm handgun using parts he bought online and purchased 1,600 rounds of various ammunition.
The weaponry was discovered packed inside a duffel bag belonging to An Tso Sun.
Sun was arrested last Monday after police said he threatened to carry out a shooting on May 1 at Bonner and Prendergast Catholic High School in Drexel Hill.
Upper Darby Police Superintendent Michael Chitwood says about 663 rounds of 9 mm ammo, 425 rounds of AK-47 ammo, 295 rounds of AR-15 ammo, 225 rounds of 12-gauge ammo, and the hand-assembled gun were recovered in the bag.
Sun is a foreign exchange student from Taiwan who has been in the U.S. since August.
He’s charged with making terroristic threats.
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