that'll get your attention. >>> was valerie mcdaniel a murderous mastermind? >> 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. >>> 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 with every newscast, including nbc affiliate kprc. >> channel 2 investigates is digging up new details. >> reporter: court documents showed leon wasn't exactly who he appeared to be. he'd been kicked out of residency programs, convicted of attempted cyberstalking and criminal trespassing. and there was another woman from leon's past who accused him of abuse, his ex-wife. >> one count of solicitation of capital murder. >> reporter: leon was held without bail. but the judge did set bail for valerie. she was allowed to go home. her sister, angela, was in shock. >> it just w