BELLEFONTE -- After seven days of preliminary hearings, Judge Allen Sinclair dropped the most serious charges against the former Beta Theta Pi fraternity members connected to the death of Penn State sophomore Timothy Piazza.

Some of the more serious charges included involuntary manslaughter to aggravated assault, while the lesser charges including furnishing alcohol to minors. Eighteen former brothers were charged for their alleged roles in Piazza's death. Two waived their right to a preliminary hearing.

Those facing lesser charges will face trial.

WATCH: Centre County District Attorney Stacy Parks Miller plans to appeal and re-file manslaughter charges. pic.twitter.com/CwYsrPryU5 — The Daily Collegian (@DailyCollegian) September 1, 2017

The decision comes after hours of questioning and cross examination of Detective David Scicchitano, the lead investigator in the case.

Parks Miller argued that the former fraternity members had been through the hazing themselves and therefore knew of the possible outcome from consuming such large amounts alcohol.

"To say they could not foresee this as a dangerous event, is absolute incredulous," Parks Miller said during closing arguments.

The defense pursued the lead that the cause of Piazza's death could not be determined as video footage from the night in question was missing.

Parks Miller has been pursuing this case since investigations started in February after Piazza's death. However, it is unlikely she will follow the trial to county court as she will be out of office in January after losing last spring's primary.

FULL COVERAGE

'Showing up the event was a voluntary choice': Closing arguments continue in the Beta Theta Pi preliminary hearing

Lawyers react following the sixth day of preliminary hearings in Beta Theta Pi case

Defense lawyer: Timothy Piazza was aware he was going to get drunk at pledge event | Full recap of hearing

Tim Bream: I did not oversee the crate race and 'gauntlet stations' | Timothy Piazza, Beta Theta Pi coverage

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