Wasnt Proof News Today

>> reporter: and when aaron heard pam was dead? >> my first response was how did he do it? >> reporter: and then he told the cops about his mother. now you may have a serial killer on your hands, serial killer of spouses. >> yeah. >> something like that. >> that was the thought. >> reporter: two wives, one missing, the other dead. and the one thing they had in common was ralph candelario. but suspicion alone wasnt enough, wasnt proof. so the investigation continued. >> yes. >> reporter: in an ef...

>> my first response was how did he do it? >> reporter: and then he told the cops about his mother. now you may have a serial killer on your hands, serial killer of spouses. >> yeah. >> something like that. >> that was the thought. >> reporter: two wives, one missing, the other dead. and the one thing they had in common was ralph candelario. but suspicion alone wasnt enough, wasnt proof. so the investigation continued. >> yes. >> reporter: in an effort to shake him or maybe even get a confession...