U.S. Marshals made fake yoga instructor ads in Costa Rica to catch Kaitlin Armstrong

New special on CBS reveals just how the feds caught the killer of Moriah Wilson

Kaitlin Armstrong trial to be aired on Court TV

The accused could face up to 99 years in prison

US Marshals: Kaitlin Armstrong used several aliases to move around Costa Rica

The suspect in Moriah Wilson murder case used many tricks to avoid detection

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