'Yoga Teacher Killer' tells the true story of a woman who murdered her boyfriend's lover before going on the run. Here's what happened to Kaitlin Armstrong.

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Kaitlin Armstrong in the Texas courtroom, and Caity Lotz in
Kaitlin Armstrong in the Texas courtroom, and Caity Lotz in "Yoga Teacher Killer: The Kaitlin Armstrong Story."

Mikala Compton/Austin American-Statesman/AP/LifeTime/YouTube

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