>> well, we started reading the text messages and started seeing how prolific they were at hunting. >> reporter: hunting? >> hunting, on almost a daily basis and how nonchalant they were about it. it was almost like ordering takeout. when you start reading, what do you feel like today, asian or mexican? >> reporter: oh, boy. what would they call these girls? >> that was the other thing. cats. >> reporter: cats? >> cats. be careful, when the cat knows it isn't getting away, it's going to fight. >> reporter: the next victim couldn't be far away. because gordon texted cano, "kitty cat later yes." to which cano responded, "ok." and then a sudden change. had they spotted the surveillance? >> reporter: as trapp listened to the wiretap, she heard gordon talk to cano about skipping town. >> i could hear the desperation in franc cano's voice. that desperation just kind of sent a hair on the back of my neck and i said, no, i'm not