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>> coming up -- thousands of miles away, this woman also had questions about john. >> i started snooping and i found everything. >> and when she spoke up, that's when things got really scary. >> tonia, you enjoy your time left on this earth, okay? because that's what's going to come down to. >> when "dateline" continues. i love my new home. i always wanted a house with historic architecture... but it might be too victorian?
>> she said, mom, i just killed your husband, i'm so sorry. i'm thinking... what? >> debra raced over there. >> you could see police cars blocking it off, fire engines. it was crazy. >> they wouldn't let you and? >> they said it was a crime scene. >> john meehan never gained consciousness. four days later, dirty john was dead. right after the attack, newport beach detective rick henri found john's killer, terra, at the hospital. her dog, still guarding her. >> she told me the whole story. the >> whole story is pretty complicated mess. >> yes. >> as doctors treated terra's moons, detective henr...
You, say you took money from them or something, they don't kill you. but they kill someone you love. because then you would be in pain the rest of your life knowing that your actions caused the death of a loved one and now you don't have them. i learned that from him. >> and the man debra once loved, she now feared. that had to be a very, very strange feeling. >> very much. yes. scared for my life. >> and not just her own life -- >> i was afraid he would kill my mom. i was also afraid he would kill me or my sister. or someone. >> after all, they had ruined all of his plans. in the summer of 20...
Gave them gifts. >> like being santa claus, or something? >> something like that. >> yeah. >> did he do it on purpose? of course, thought terra. >> that made me so upset. >> terra was very emotional, i thought, just suck it up its christmas. have fun. >> instead she felt that man had come and usurped something? >> yes. >> something? >> yes. >> not only stolen their christmas, not the daughters, but both of them worried he was stealing there too trusting mother. taking advantage of her. she just let him drive her car. why would he need to? wasn't he a prosperous doctor, and anesthesiologist, co...
She split her time between there and orange county. but the doctors want to to went into rescue mode. one thing they found especially alarming was yet another police report about dirty john. this one from just two years earlier and much closer to home. the police in laguna beach had arrested john meehan for stalking a woman. and they discovered he had rented an office space in which they found zip ties, cyanide and two loaded guns. what did all of that seem to you? >> he might be a killer and she has to get out of this. >> has to? >> has to. >> john had an explanation, of course. even for that...