ina hess told the investigators that pam's last client, day she was murdered, was a man named eldon whitlowpam? >> there was no evidence that eldon had any beefs. they had a long-term, professional relationship where she was helping him with his investments. >> whitlow told detectives his meeting with pam was uneventful. he left around 5:40 p. m., he said, then had dinner with his girlfriend. he was cooperative. but -- >> he owned a. 9-millimeter gun. >> and she was shot with one of those. >> that matched the type of gun that she was killed with. >> now that was a development. >> eldon whitlow was considered a person of interest. >> detectives got a search warrant, and eldon turned over a. 9-millimeter. the. 9-millimeter? they sent it off for testing. and as they waited for the results, they drilled down on that one more possible person of interest. the third man. a man who just might have had a motive. pam's ex-husband, kirk zimmerman. look at him, said pam's family. there was something going on there. >> problems. >> it definitely turned into hatred. >> a lot of problems. >> problems? hat