HOLLIDAYSBURG, Pa. (WTAJ) -- Three inmates have been charged after allegedly attacking another, ultimately causing him to be put in the intensive care unit (ICU) at UPMC Altoona. Koleton Bem, 21, Christopher Sensabaugh, 30, and Ryan Shutt, 24, were charged with aggravated assault with extreme indifference, assault by prisoner on another, and related charges…