COLFAX, Wash. -

Charges will not be filed in the brawl between University of Idaho and Washington State University football players that left one player with career-ending injuries.

Whitman County Prosecutor Denis Tracy declined to prosecute Idaho Vandal receiver Roman Runner and WSU Cougar receiver Mansel Simmons.

Runner allegedly punched Simmons when he charged him during an altercation that occurred outside a house party that the players were attending on Pullman's College Hill in late March. Simmons suffered a serious head injury and was flown to a Spokane hospital.

Pullman police asked that Runner be charged with second degree felony assault and Simmons be charged with misdemeanor disorderly conduct.

Tracy has decided to drop the case, saying that Runner likely acted in self defense.

Tracy admits that Simmons was likely the instigator and the extent of his injuries from the punch are preventing him from filing a disorderly conduct charge.