this is where stacy stewart claims that it was chris thomason who burned those bloody clothes.en michele harris'. what are these? >> there's a bra strap. there is a button that appears to come from some form of women's apparel. >> reporter: this is more archaeology than criminology. >> it is, absolutely. >> reporter: you can see where this is going. these private eyes peering back into the past and seeing stacy stewart or chris thomason somehow linked to michele harris' disappearance or maybe even her murder. >> i don't know who's responsible for michele harris' demise. what i believe at this jcture is that there are at least two people associated with this property and this pit that have more information than they have given to anyone at this juncture. >> reporter: tonight, chris thomason sits in a texas jail, incarcerated for an unrelated crime. we reached out to him, but he declined comment. but on those audio recordings he denies ever burning anyone's clothes. >> i didn't -- i didn't do anything. i don't know anything. >> reporter: as for stacy stewart, he was also called t