i saw it too and i have to admit, i was not watching closely but have noticed that when certain stories make big national news, a similar story line shows up on certain shows (CSI being one of them) ... it made me sad too but i thought the point of them showing it was to bring awareness to the situation...so people who just hear about dog fighting but do not really know what it means can familiarize themselves with it and hopefully be shocked enough to try and make a difference in STOPPING it...
JMO but i am hoping this is why they showed it