while police are putting rhodes in handcuffs, detective paula zitzelberger finds the knife used in thewife's purse. >> there was a very distinctive knife shining brightly at the bottom of her purse and i realized that was probably our weapon. it matched the description that had been given by the victims. he asked her to keep the knife in her purse. he said police can't search your purse. >> rhodes' wife tells police she thinks his request to hide the knife is strange, but complies without asking any questions. she denies any knowledge of or involvement in her husband's crimes. the knife helps police tie rhodes to his crimes. but they aren't sure how many women he has attacked. under interrogation at the police station, detective thinks she finally has her man and brings in rhodes' wife to try to get him to open up. >> at one point he looked over at his wife and he said, what should i do? and she said, you need to tell the truth. after a few moments, he finally broke down and started to cry and said, i need help. >> she first gets rhodes to confess to the sexual assault he carried out i