Why wasn't Mike Peake charged with having a gun on the UNM campus?

ALBUQUERQUE, N.M. (KRQE) – State leaders have vowed to fight to keep guns off school campuses but after one of the biggest, high-profile cases involving guns on the University of New Mexico campus, Mike Peake will not be punished.
On November 19, security cameras clearly shows New Mexico State University basketball player Mike Peake with a gun, shooting back at UNM student Brandon Travis. Travis was killed and Peake was wounded. Peake even had talks with police in the hospital ab