>> reporter: in other words, about 70 miles from the crime scene. but why would he commit a robbery so far away from home? >> that's one of the flags that immediately came up. >> reporter: when detective birdsall and his partner first asked him, nick gave them an answer that, frankly, still didn't make sense. >> we came at him. and you know, his initial story was, oh, i heard this was a good area. >> reporter: really? there wasn't a good area closer to home? well then nick gave them another answer. >> he wanted to get out of his area. and he worked at a local gym up there where he's a gym rat and worked out with police officers and did martial arts with police officers. he felt they would recognize him. >> reporter: when he said that, did it seem plausible? >> no. it wasn't plausible at all. >> reporter: and one other thing. remember how, when police arrested him, they found jewelry in his pocket? turned out it was fake. even though lynn had lots of real diamonds right there to be taken along with other valuable