Cullen has contributed work to The New York Times, National Public Radio and the online publications Salon.com and Slate.com.He covered the school shootings in Littleton, Colorado, as well as the trials of the murderers of Matthew Shepard in Laramie, Wyoming. A former lieutenant in the U.S. Army, Cullen taught creative writing at the University of Colorado in the mid-1990s. He is currently working on several magazine projects. Request Publications