here is dennis murphy what diabolical. >> locked in the cage.rieks of wind and howling in the night. >> this isn't real. it's something we see in the movies. it doesn't happen in real life. >> how did a self-described goody tissue, disney princess, he swept away innocent conspiracy so convoluted, so twisted? >> this is one of the most well thought out, well executed plants. it is scary. >> diabolical. >> absolutely. >> a tangled web, you bet. altogether bizarre plot. complicated scheme. >> very complicated. very creative. >> this is the most shocking form of love rivalry i have ever seen. >> there would be allegations of harassment, cyber stalking, assault and attempted rape. someone was going to get hurt. someone was going to jail. at the end of the nightmare, well, no one saw that come in. you decide whether it was a love rivalry. in the beginning, it was clearly a boy meets girl love story. >> it was a very intense period of my life in the sense of a role went type of roe mouths. >> august 2013, 20 something, michelle hadley, met the u.s. nat

here's dennis murphy with "mystery in south beach." >> if you spent any time down here, you probably sense there are really two miami beaches. you know this one by reputation anyway. south beach. a pulsating playground with energy that surges out of the ocean and exhausts itself in the all-night clubs. and then there's the old miami beach. here are the sunburned back streets of apartment blocks, where decades past the old people used to sit out in aluminum chairs. and that's where a young couple, wendy and michel, were trying to make a go of it. the rent was cheap. the window air-conditioning good enough. but if you ever thought beautiful people catch all the breaks, then listen to this story of 21-year-old wendy trapaga because she may be the most gorgeous doomed young woman to ever walk these streets. >> she was model pretty. >> i don't think that she thought of herself as anything spectacular. >> her much older sisters and brother ralph never use the qualifier step sister. they'll tell you she was a little bit of a daddy's girl, her father, an international airline pilot who died,

he is dennis murphy with circle of friends. >> remember going away to college?our first time away from home, there were new friends waiting to be made, the tingling of possibilities. >> oh god, the first case was amazing. >> sometimes disappointments when things did not work out. >> i thought he was just depressed, we just did not take that seriously and, you know, we maybe we should have. >> for three florida teenagers, the decisions they made as they started campus life had terrifyingly, thiel consequences. >> it all seemed so surreal when we talked about it, we were like this can't possibly happen. >> the story of our three begins at a high school near miami, not quite hogwarts but erika, pedro, and christian were inseparable as harry, ron, and her my knee. a trio of friends, laughing and wrestling through adolescence together after the academy, a charter school for high achieving smart kids. >> i went there in 2006 for the sixth grade. >> for erica freeman, the academy was a special place. >> i met people from all over the world actually, it's really interes