that'll get your attention. >>> was valerie mcdaniel a murderous mastermind? n jacob. >> i couldn't believe this was happening to my sister. >> what could have driven valerie to do this? she tells her story. and leon tells his when "dateline" continues. ♪ and relief from symptoms caused feel the clarity of non-drowsy claritin by over 200 indoor and outdoor allergens. like those from buddy. because stuffed animals are clearly no substitute for real ones. feel the clarity. and live claritin clear. but allstate actually helps you drive safely... with drivewise. it lets you know when you go too fast... ...and brake too hard. with feedback to help you drive safer. giving you the power to actually lower your cost. unfortunately, it can't do anything about that. now that you know the truth... are you in good hands? >>> the headline was just so sensational -- ritzy river oaks couple take out hits on their exes. >> the murder-for-hire plot that sent shockwaves through river oaks. >> reporter: in the days following the arrests, revelations about leon's past flooded in wi