in josh healy: yes. nkiewicz (voiceover): and all of that pointed either to the ex-boyfriend lance or to angie's current boyfriend, ben. or maybe to a new man in her life, the man she'd been out with the last night of her life, russell. soon, police would ask sheila, then a college student, to help narrow down that list of suspects and solve the crime. he killed her. he needed to pay for it. craig melvin (voiceover): coming up. sheila's nerve-racking night with suspect number one. here i am, sitting across from this man thinking, i'm eating dinner with a murderer. craig melvin (voiceover): and then investigators get a break. they had their guy now. craig melvin (voiceover): when "dateline" continues. [dramatic music] trust me, you're not alone. >> that's why we develop new doctor's preferred mindful advantage, the cutting edge, science backed brain health supplement that will help keep your mental edge sharp. >> to get your complimentary sample of new mindful advantage, just text mind to 321321. >> mindfu