PHILADELPHIA, PA. (THECOUNT) — An-Tso Sun has been identified as the Taiwanese man accused of threatening to carry out a shooting at his suburban Philadelphia Catholic high school.

Monsignor Bonner and Archbishop Prendergast High School exchange student, “Edward” Sun, pleaded guilty to a federal firearms charge Tuesday and is scheduled for sentencing in December.

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School authorities were alerted in March that Sun talked about a May 1 shooting at Monsignor Bonner and Archbishop Prendergast High School in Upper Darby, about 7 miles (11 kilometers) west of Philadelphia. The teen called the talk a joke, but authorities found more than 1,600 rounds of ammunition, as well as weapons, in his home. source

His defense attorneys previously said Sun “had no intention or plans” to commit a school shooting and many items found were what he wore to school for a Halloween costume contest.

Keiko, @keikoinboston via twitter:

“Taiwanese celebrity parents of An-Tso “Edward” Sun said to be selling homes to raise money for his defense on federal charges. He’s facing a felony conviction w/ max 10 years in prison + $250K fine”

Sun previously pleaded guilty to state terroristic threat charges and was sentenced to four to 23 months.