investigators contact biela and he agrees to an informal meeting on the way home from work. in detective wygnanski's car in a wendy's parking lot. >> he was jovial, no issues or nothing like that. it's really not interrogation of -- i mean, the guy, he's free to leave, he could tell me to f.o. he doesn't have to answer anything. it's basically just a chitchat question and answer session. then i said, i'm investigating the murder of brianna denison. he automatically, instead of having the eye to eye contact, he would look out that window. it was pretty chilly out, and you could see sweat beads forming on him. everything just changed, and this was the reaction we were looking for. he goes, you can call my girlfriend. she'll be my alibi.