DELAWARE COUNTY, Pa. (CBS) — A foreign exchange student who threatened to attack his Delaware County high school pleaded guilty in court on Tuesday to a federal ammunition charge.READ MORE: 30 Years Later, Search For Joy Hibbs' Killer Continues With New Reward Posted For Information
An-Tso Sun, 18, is a Taiwanese national.
He was formally charged with possessing ammunition while being in the United States on a non-immigrant visa.READ MORE: 17 People Injured In Crash Involving SEPTA Bus After Car Runs Red Light, Officials Say
Sun threatened a shooting at Monsignor Bonner-Archbishop Prendergast High School on May 1.
Authorities say they found over 1,600 rounds of ammunition and a homemade pistol in his bedroom.MORE NEWS: Arrest Warrant Issued For Contractor Ronald Williams Accused Of Scamming At Least 10 People Using Nextdoor App
Sun’s sentencing is scheduled for Dec. 11.