They are among more than two dozen charged in the hazing death of Timothy Piazza last year.
Shapiro appeared with Piazza's parents in Harrisburg on Tuesday as he announced results of his office's own investigation.
Shapiro filed an appeal to allow the case to go to trial, so a jury can make a final decision.
"They must be held accountable for their individual actions, for their respective roles in planning that fateful night, in failing to render aid and in leaving Tim to die in their fraternity house," Shapiro said.
12 of the defendants facing lesser charges of hazing, furnishing alcohol to minors, and reckless endangerment are scheduled for a court hearing on Wednesday.
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