with a gun on a dirt road around the time teresa was killed. >> did she associate it with this crime? >> she knew miss teresa was killed down that way so she reported it. >> was this the break they were looking for? >> the tip led to real flesh and blood. in fact, to a quite literal snake in the grass. coming up, a curious incident from teresa's past. could it shed light on the crime? >> i looked at her, and i said you need to stay away from that woman. >> when "secrets in a small town" continues.