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>> what did that say to you? >> a great deal of rage by someone. >> he looked like your average high school student. tall, clean cut, polite. >> a teenager with two sides. >> he would yell at her. he would be pushing her around. >> a puzzle seemingly solved, then blown apart. >> we recorded the conversation and it was dynamite. >> micaela was on the ground and she wasnt really moving. >> to unravel the mystery, investigators would follow a trail through high school hallways, teaming wi...

he would be pushing her around. >> a puzzle seemingly solved, then long apart. >> we recorded that conversation, then it was dynamite. >> mckayla was on the ground, and she wasnt really moving. >> to unravel the mystery, investigators would follow a trail through high school hallways, teaming the secrets and schemes. >> the hatred grew more and more and more. >> the whole idea became a horrible idea. a bad idea that went very, very bad. ♪ ♪ ♪ >> he waves at you from miles. the bi...

Very time she disappeared. >> there was a lot of texts and phone calls, transpiring just immediately after school, and up until just after five. >> and then they stopped? >> abruptly stopped right at the time she left the school. >> those calls and texts, being off the local cell phone tower, were all from one number. >> definitely having communications back and forth. >> there was something going on. >> something. the last calls were made to cody patent. >> cody patent? who was he? certainly no...