A grand jury issued a 31-count indictment against Ernest Heinz.
He was already charged with attempted murder for the unprovoked shooting of a stranger that led to a lockdown at Stockton University on September 11.
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Most of the additional charges are related to weapons offenses, after several firearms were found inside a storage facility that the 46-year-old allegedly visited within a half-hour of the shooting.
Heinz has another court hearing next month.