Inside the Hunt: How U.S. Marshals Captured Caitlyn Armstrong

The gripping investigation into Caitlyn Armstrong’s 43-day run from law enforcement unfolds in the latest 48 Hours special. Armstrong, who was convicted in 2022 for the murder of professional cyclist Mariah “Mo” Wilson, was sentenced to 90 years in prison. This episode reveals how U.S. Marshals tracked her down in Costa Rica after a month-long international manhunt.

The Disappearance and Pursuit

After a warrant was issued for Armstrong’s arrest, she fled the U.S., using various aliases and altering her appearance with plastic surgery. Her trail led investigators to the remote village of Santa Teresa, Costa Rica—a popular tourist destination filled with hostels and travelers. Despite extensive efforts, including undercover operations, the Marshals initially hit several dead ends.

A Yoga Ad Breakthrough

Leveraging Armstrong’s passion for yoga, the Marshals placed an ad seeking yoga instructors on a local Facebook page. Days of silence followed until they finally received a response. A woman identifying herself as a yoga teacher arranged a meeting with investigators posing as tourists.

The Arrest

When U.S. Marshal Deputy Amir Perez came face-to-face with the suspect, he didn’t immediately recognize her due to her altered appearance. But a moment of eye contact confirmed her identity. Armstrong was apprehended and extradited to the U.S., bringing her flight to an end.

Remembering Mariah Wilson

Mariah “Mo” Wilson, the victim in this tragic case, was remembered as an inspiring, dedicated professional cyclist. Her untimely death sent shockwaves through the cycling community and underscored the tragedy of the case.

This 48 Hours investigation highlights the persistence and creativity of law enforcement and the lengths some will go to evade justice. Catch the full story to uncover the detailed and dramatic events of the pursuit.