AZUSA, Calif. — Neighbors of the 81-year-old man accused of being a “serial slingshot shooter” who terrorized his neighborhood for a decade by allegedly firing ball bearings through windows and windshields expressed shock at his arrest, a day before his sudden death on Wednesday.

Prince King, who lived in Azusa, California, died of heart disease at a private residence, the Los Angeles County Medical Examiner said on its website Thursday.

King’s neighbors in Azusa, a small city some 26…