she had no driver's license, remember, so she asked howard gatts to give her a lift to her therapist's office. >> gave me a hug, said good-bye, thank you very much. she was in a real good mood. >> an hour and a half later, howard saw her again. this time at the gym. >> she said, is it okay i skip rope over here, howard? i said, sure, kate, that's fine. >> mind you, there was an incident at the gym. howard's soon-to-be ex-wife came around. she and kate had words. but at 8:00 p.m., a drugstore camera showed kate relaxed, talking on her cell, buying wine and snacks while waiting on her prescription refill. ethan paid for dinner. chicken, salmon teriyaki. >> like a japanese like -- kind of like cuisine-type thing. >> she didn't drive, so he took her home. dropped her off before midnight. something earlier that friday that bothered the warings at first was terrifying them now. the more they thought about it, the worse it seemed. just before she went to the drug store friday evening, she started telling her father about some problem. >> saying that she felt like she perhaps had unintentional

it was howard gatts, for example, a martial art trainer in the midst of a contentious divorce with whomhing of a romance. >> i felt that in my heart something was wrong. and i was -- i was concerned. >> then there was jason locke, a young lawyer with whom she often shared lunch and a spirited debate. >> she was strong-willed. she was very energetic. she was rarely, rarely incorrect. that's a -- >> her best friend, as she made clear to all the others, was ethan mack. >> she really liked ethan. she really trusted him. "this is my best friend, jason." she put a lot of trust in him. >> she's a lovable person, full of energy, always around. >> ethan worked in a local hotel. a very different background than kate. but he'd been her best buddy for years. and in a way, her protector. everybody in ethan's neighborhood knew you didn't mess with kate when ethan was around. they loved each other like -- well, siblings. >> i made sure no harm would come to her when certain little boyfriends would act like they got hand problems. i would put them in their place -- >> it wasn't a romance at all then? >