Penalties include expulsion from school.

"There is evidence of violating the student code of conduct," Palian said. "If the fraternity was found to be involved in hazing, we have a zero tolerance for hazing."

Palian said he hopes students realize the consequences of hazing and binge drinking.

"I am sure certainly for the university's student organizations, this is a situation that hitshomeand hopefully it will be a wake-up call. This is a problem that is a national problem," he said.

Although Bogenberger's family declined to talk Monday evening, their lawyer suggested NIU also shares some culpability for the teen's death.

"Everyone in this milieu has some sort of accountability," Coladarci said. "The university must know that this goes on and they may have turned a blind eye."

Over the past 15 years, hazing has become more violent, sexual and humiliating because students have taken tradition and morphed it into their own version, which has become lethal, said Dr. Susan Lipkins, a New York-based psychologist who studied the issue for a decade.

Some states, like Illinois, have created a felony charge for hazing, but most have only misdemeanor charges, Lipkins said.

At least 45 college students have been charged with hazing-related crimes in the past calendar year, according to news accounts.

DeKalb police contacted students charged in the case Monday to notify them that arrest warrants had been issued and to ask them to turn themselves in, Leverton said.

None of them had done so by late Monday, but Leverton said police would give the students a couple of days before sending officers to track them down.

"We expect cooperation with that, and we've had, by and large, cooperation throughout the investigation," Leverton said. "I mean, nobody had an intention of things getting this severe, and nobody had the intention of causing this young man's death."

Tribune reporters Jodi S. Cohen, Ted Gregory, Melissa Jenco and Jennifer Delgado and freelance writer Jack McCarthy contributed.