NEW : Student blog says `` it was if a floodgate had opened '' as suspect overcomes shyness . By Michael Isikoff, CNN National Correspondent (CNN) -- Dylan Quick is forthcoming with information , police say . Quick is to undergo a psychological evaluation , the Harris County DA says .
NEW : Student blog says `` it was if a floodgate had opened '' as suspect overcomes shyness . Born deaf , suspect learned to express himself at a teen book club on campus . Dylan Quick is forthcoming with information , police say . Quick is to undergo a psychological evaluation , the Harris County DA says .