and no arrests since the killing. they have offered the public few details on the investigation. jonna spilbor joins me now. this is paul's uncle who said he heard about the death threats and now he has some regrets. watch. >> i didn't think it was credible threats. if it was, i would have tried to do something or notified someone but i guess the -- maybe i made a mistake. >> dana: fascinating case in south carolina. how do you see it this morning? >> whenever you have a case that is a murder mystery. you have two people gunned down on their private property. first thing investigators will do is try to figure out who would want these two people dead. we call it motive. who would be motivated to execute this killing. and in a case like this you would almost think that it's a needle in a hey stack.