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in a new 48 Hours investigation for the first time we hear from law enforcement officers who tracked down a killer on
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the Run Katlyn Armstrong eluded authorities for 43 days back in 2022 after police issued a warrant for her
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arrest she was suspected in the murder of Mariah Wilson an upand cominging professional cyclist and in November
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Armstrong was indeed convicted in a Texas Court of first-degree murder and sentenced to 90 years in prison now
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Jonathan Vigliotti has the very first interview with the US Marshals who went undercover to track Armstrong down and
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bring her in here's an early look at his 48 Hours report in June 2022 one month after
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Caitlyn Armstrong suspected of murdering Mariah Wilson disappeared Deputy US Marshals Damen Fernandez and Amir Perez
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traveled to Costa Rica they knew finding Armstrong was going to be a challenge we had intelligence indicating
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that she was was staying in hosts in Costa Rica and I don't know if you know anything about Costa Rica but Costa Rica
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has a lot of hostels a lot an unbelievable amount of hostiles A source told them Armstrong could be hiding out
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in the small village of Santa Teresa but it was challenging because the town was
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full of tourists many who look similar to Armstrong the marshals would later learn that Armstrong had also used
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different names and had changed her appearance she had cut and colored her hair hair and even had gotten plastic
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surgery they hit dead end after dead end so you're this close to giving up yes so
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after many intense days of searching for Armstrong with no luck the marshals decided to try one last tactic hoping
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that Armstrong's love of teaching yoga would pay off for them they turned to a local Facebook page we decided we were
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going to put an ad out for a yoga instructor and see what would happen and just saying a we're this hostel we're
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looking for a yoga instructor the soon as the possible please contact us at this number but after almost a week of
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hunting even that didn't seem to be working we haven't gotten any response back from
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anything none of them have panned out so the marshals were about to head back to
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the United States when suddenly they got a break we got a bite somebody that identified herself as a yoga instructor
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and said that wanted to meet with us at a particular hostel and we said this is this is our
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[Music] chance wow Jonathan vigotti joins us now Jonathan good morning so that bite I
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guess was an email the Marshalls got what happened after that email arrived yeah Tony good morning to you it's a
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remarkable story because the marshals we spoke with said Caitlyn Armstrong nearly
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got away with it all the woman that responded to this ad said that she was a yoga instructor working at at a local
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hostel in Santa Teresa the marshals quickly moved in they sent in Deputy Marshall Perez to make that initial
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contact he had been studying images of her for several weeks but what's remarkable when he came face to face
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with her there pretending to be a tourist he said he didn't recognize her at first until his eyes locked with hers
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and that's when he realized they had found the woman that they had been searching for it was later discovered
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that she got plastic surgery specifically to change the shape of her nose wow and almost got away with it now
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she's serving 90 years in prison for killing Mariah Wilson what did you learn about Mariah the victim as you were
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covering this case Mariah Wilson she went by Mo an incredible woman very smart she studied at Dartmouth
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engineering but she was ultimately driven by PR gravel bike racing and she wanted to get more women involved in the
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sport she quickly Rose to the top of the sport and was incredible at what she did
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but despite all of her career achievements everyone we spoke with said she was a remarkable woman because she
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was so caring so supportive and ultimately everyone said she just had no idea she was at the center of what would
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become this Deadly Love Triangle Jonathan Vigliotti Jonathan thank you very much you can watch
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Jonathan's full report capturing mariia Wilson's killer on 48 hours tomorrow night at 109 Central right here on CBS
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and streaming on Paramount Plus