Kaitlin Armstrong in April 20, 2023.Photo:Jay Janner/American-Statesman / USA TODAY NETWORK

Kaitlin Armstrong makes a pre-trial appearance at the Blackwell-Thurman Criminal Justice Center on Thursday April 20, 2023.

Jay Janner/American-Statesman / USA TODAY NETWORK

Closing arguments have begun in the trial ofKaitlin Armstrong, who is accused ofmurdering a 25-year-old womanin cold blood an hour after the victim had dinner and drinks with Armstrong’s boyfriend.

Anna Moriah “Mo” Wilsonwas fatally shot on May 11, 2022 — and according to prosecutors, it was all because of jealousy.

“She stood over her after she shot her in the head twice and put another bullet in her heart,” Assistant District Attorney Rickey Jones alleged during closing arguments on Thursday, according toreporters in the courtroom. “You heard the medical examiner. That third bullet was in her heart.”

Mo Wilson.Mo Wilson/Instagram

cyclist Mo Wilson

Armstrong, a former yoga instructor, was in an on again, off again relationship with professional cyclist Colin Strickland. During a breakup, Strickland began seeing fellow cyclist Wilson, but eventually reconciled with Armstrong, theAustin American-Statesmanreports.

At the time of Wilson’s murder, Armstrong and Strickland were together, but he remained friends with Wilson, according to the outlet, and went swimming with her before having dinner and drinks together on the night she was killed. Strickland dropped Wilson off at her friend’s home, where she was staying on the evening on May 11. An hour later, Wilson’s friendCaitlin Cashfound her suffering from fatal gunshot wounds.

From left: Kaitlin Armstrong, Colin Strickland, Anna Moriah “Mo” Wilson.Austin Police Department

Kaitlin Armstrong, Colin Strickland, Anna Moriah “Mo” Wilson

Austin Police Department

Want to keep up with the latest crime coverage? Sign up forPEOPLE’s free True Crime newsletterfor breaking crime news, ongoing trial coverage and details of intriguing unsolved cases.

During the trial, prosecutors claimed that Armstrongused a fitness appto track Wilson’s location to where she was staying in Austin on May 11. She also began to monitor her whereabouts on social media in the days before the killing, prosecutors claimed.

A friend of Armstrong’s also testified that Armstrong said, “I would kill her,” after the friend asked what she’d do if Strickland dated anyone else,PEOPLE previously reported.

Armstrong is also accused of fleeing to Costa Rica in the days following the murder. She was captured on June 29 after 43 days on the run, theU.S. Marshal Serviceannounced at the time and revealed that she used a fraudulent passport on May 18 to flee the country. When she was returned to the U.S., she was charged with murder in connection with Wilson’s death. She pleaded not guilty.

If convicted, she faces life in prison.

source: people.com