>> after i heard the gunshot, i ran in to see what was going on. >> what room were you in when that happened? what room? >> i was in the back room. >> that was music to my ears. >> rick had him right where he wanted, inside the house. and none too soon. >> you got an attorney now. >> an attorney who immediately stopped the interview. >> just under the wire and just in the knick of time. >> detective arnold placed williams and quisenberry under arrest and then he wasted no time making the one phone call he had waited 15 months to make, to erica's grandmother. >> i literally got done making the bathroom and made that phone call from the bathroom. >> what was it like, making that phone call? >> it was an echo, because it was in the bathroom but i promised judy harper that i would get the suspects and now we had them. >> what did you think? >> just relieved. i had confidence they would find them sooner or later because they couldn't get away with it it forever.