jim doty and cpl.yan avis of the pottawattamie county sheriff's office, who joined the investigation much later, said the next step was to find the woman who'd paid for the furniture. her name was shanna golyar. >> they called her. left a voicemail. which she returned that call the next day. shanna went by her middle name, liz. and it turned out that was the same 'liz' dave kroupa once dated. she lived in omaha with her two kids. liz told the cops that somebody stole her checkbook. and she suspected that somebody was the woman she ran into at dave's place. liz gave the detectives his contact information. >> reporter: she's with him and then, suddenly, she goes off the rails, and starts doing s-- weird stuff like this. >> uh-huh. >> reporter: he must know something, right? >> yeah. >> definitely a person you wanted to talk to. >> reporter: and by then, the story dave could tell the police? scary. coming up. >> he was drilling me with them policeman eyes. >> reporter: police have some questions for dave.

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