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Paramedics arrived shortly after and attempted to save her, but Wilson was pronounced dead soon after.
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As news of her death spread, unease rippled through the cycling community. Female cyclists, in particular, began warning one another, fearing Wilson may have been tracked through her workouts on Strava and questioning what was truly safe to share on Instagram.
It wasn’t long before investigators focused their attention on Kaitlin Marie Armstrong, a yoga instructor and estate agent.
Why did Kaitlin Armstrong kill Mo Wilson?
On 11 May, Wilson went for a swim with Colin Strickland, a leading men’s gravel racer with whom she had previously had a brief romantic relationship. He later dropped her back at Cash’s home and left. Within minutes of her arrival, security cameras captured a dark-coloured SUV driving past the property with a large bike rack on the back. Police later reported that the vehicle was registered to Strickland’s long-term girlfriend, Kaitlin Armstrong.
Investigators also discovered that Armstrong owned a gun, reportedly a gift from Strickland, and ballistics matched it to the three bullets that killed Mo.
It later emerged that Strickland had lied to Armstrong about his whereabouts that day, deleted text messages from Wilson, and saved her number under a different name in his phone.
Prosecutors ultimately argued that Armstrong had tracked Wilson’s movements and, driven by jealousy, confronted and shot her.
What happened to Kaitlin Armstrong?
Armstrong was initially arrested on a misdemeanour warrant for failing to pay for a Botox treatment in 2018, but was released due to a discrepancy in her date of birth. Just days later, she sold a black Jeep Grand Cherokee at a CarMax in South Austin.
She then fled the United States, triggering a 43-day international manhunt.
As authorities intensified their search, Armstrong reportedly spent weeks moving between hostels and yoga studios in Santa Teresa, Costa Rica, using multiple aliases, according to the United States Marshals Service.
She was eventually located on 29 June, when Costa Rican authorities conducting door-to-door enquiries found her at a hostel with her red hair dyed dark brown and a bandage on her nose, which she claimed was the result of a surfing accident.
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