Homicide ruled in Nevada student's death after fraternity's 'fight night'

Homicide has been ruled in the death of a University of Nevada, Las Vegas student who collapsed after participating in his fraternity's "fight night."

Homicide has been ruled in the death of a University of Nevada, Las Vegas student who collapsed after participating in a charity amateur "fight night" organized by his fraternity, authorities said.

The death of 20-year-old Nathan Valencia was determined through an autopsy to be a homicide caused by blunt force trauma to the head, but a spokesperson for the agency told ABC affiliate station KTNV that simply means he died at the hands of another and not necessarily as a result of a criminal act.

Valencia's distraught relatives have hired a lawyer to get to the bottom of how UNLV's Sigma Alpha Epsilon fraternity was permitted to host the off-campus amateur boxing match they claim was sanctioned by the university and is held annually.

"We will leave no stone unturned to determine how a 20-year-old ended up in a school-sanctioned amateur fight that cost him his life," Valencia's family said in a statement.