>> yes. >> reporter: maliek kearney was free to go.yland detectives were back to square one. at the beginning of what would become an incredibly complex homicide case, an investigation that would span a half-dozen states, involve hundreds of witnesses, multiple government agencies and a mountain of forensic evidence. >> coming up. could karlyn's top-secret work have cost her, her life? >> i wondered if she was targeted, or knew something she wasn't supposed to know. >> i remember specifically them telling me did she come into a lot of money she couldn't explain? get a hobby. you should meditate. eat crunchy foods. go for a run. go for 10 runs! run a marathon. are you kidding me?! instead, start small. with nicorette. which can lead to something big. start stopping with nicorette ♪ ♪ ♪ ♪ for every trip you've been dreaming of, expedia has millions of flexible booking options. because the best trip is wherever we go together. ♪ because the best trip is whsave without eventher. leaving your house. just keep your phone and switch to xfinit