Opening Statements: Yoga Teacher Kaitlin Armstrong Uses Fitness App to Find & Murder Boyfriend’s Professional Cyclist Love Interest

Opening statements began on Wednesday in the trial of a Texas woman who allegedly fled to Costa Rica after killing her boyfriend’s love interest last year.

Prosecutors said they will present audio of Moriah “Mo” Wilson, 24, screaming before shots ring off. They claimed the audio also caught suspect Kaitlin Armstrong, 34, fire again while standing over Wilson, who stopped screaming, according to KVUE.

“The last thing Mo did on this earth was scream in terror,” Travis County prosecutor Rickey Jones said during opening statements.

READ: Continuing Coverage on the Kaitlin Armstrong Case

On May 11, Armstrong, allegedly shot and killed Wilson, a professional cyclist who was staying at a friend’s apartment in Austin at the time.

Armstrong is believed to have killed Wilson upon learning she slept with her boyfriend, Colin Strickland, who allegedly lied to Armstrong when he went swimming and out to dinner with Wilson on the day she was killed. He also allegedly disguised her name in his phone to keep Armstrong from knowing he was communicating with her.

Kaitlin Marie Armstrong /U.S. Marshals Service

Prosecutors said Armstrong was tracking correspondence between Wilson and her boyfriend through a shared iPad. They also claimed that on the day of the murder, Armstrong managed to find where Wilson was staying in Austin through Strava, a fitness app that allowed users to log their workouts. Wilson reportedly logged a three-mile bike ride on the app shortly before her murder.

During the May 14 interrogation, police reportedly showed Armstrong footage of her car outside of the apartment where Wilson was found dead. The same day, Armstrong allegedly flew out of Austin and boarded a connecting flight to New York LaGuardia Airport.

According to reports, someone drove Armstrong to an airport in Newark, New Jersey, on May 18 — a day after a warrant was issued for her arrest. However, investigators found no outbound flight reservations listed under her name at the time.

Authorities believe Armstrong used a fraudulent passport to flee the country and cut and dyed her hair to evade detection. She was arrested in Costa Rica on June 30.