but they were really acting fearful. >> anyway, why would vicious killers not have killed than, two? the night of the murder he they were interviewed. >> my name is eric by the way. >> did they seem nervous or agitated? >> not really nervous or agitated. just kind of an emotional. >> even at times, cold towards the victim. roger's father. >> he was a cantankerous old far and he says his mouth everybody. >> and as they told their stories. detective started noticing subtle differences. >> and they had blue, fuzzy gloves. they looked like women's winter driving gloves. or something. a physique. >> they had -- i know they had purple gloves. purple, you know, your medical. gloves >> lots of details in which they didn't agree. so the sergeant decided to employ a well-known prerelease interview technique. he got tough. accusing. >> quite frankly, i think this story is a bunch of crap. i think this story is a bunch of crap that you and roger have