Im sitting next to two IT guys right now who could have that IP address in a flash.
Giving them free ammunition?? Are you kidding me? Peoples beloved dogs and cats being murdered is not "free ammunition." This is a horrific, heinous cruel act of savagery that absolutely needed to be reported to ANY law enforcement agency that could have found and prosecuted this man. Pure and utter evil. I think that you all don't understand the seriousness of this crime. This is a serious crime that can and should bring jail time.