(CNN) The parents of a Penn State University student who died in a hazing ritual have settled with the university and sued 28 members of the fraternity they say contributed to their son's death.

Jim and Evelyn Piazza settled with Penn State last week for an undisclosed amount of money and safety reforms almost two years after the death of their son, Timothy.

The agreement also features strong language stipulating the university's commitment to permanently barring Beta Theta Pi from existing at Penn State.

Wrongful death lawsuit

The civil lawsuit filed Thursday in federal court names 28 former Penn State University Beta Theta Pi fraternity members, alleging negligence, conspiracy and battery assault. There are three criminal cases in connection with the incident that remain in various stages of the legal process.

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