They sent it off for testing. as they waited for results, they drilled down on one more possible person of interest. the third man, the wasn t who just might have had a motive, pam okay ex-husband, curt zimmerman. look at him, said pam s family. there was something going on there. it definitely turned into hatred. a lot of problems. problems? hatred? exactly what was the problem between pam zimmerman and her ex-husband kirk? coming up, the ex, the clients, the fiancee, revelations about them all. who was it who said no secrets in a murder investigation? exactly. when dateline continues.