This is awful. My condolences to her family and friends.
A user who claims to be her sister wrote the following on r*ddit:
I'm her triplet sister. She killed herself in her dorm room. She had a concussion a few months before and it changed her a lot. Wanted to put that out there.
Thank you. This is the worst thing that has ever happened to any of us. My brother and I feel so unbalanced without her.
She had a bad crash and broke her arm and hit her head. Pretty sure it was at the velodrome track cycling. Her other teammates got injured too. Chloe Dygert broke her clavicle then as well.
For some very, very unknown reason, the word r*ddit is a banned word on bike forums (and admins refuse to remove it from the banned words list, even though it's the 3rd most popular website on the entire internet). So, replace the asterisk with an 'e'.
https://www.r*ddit.com/r/news/comments/azlu4g/us_olympic_medalist_kelly_catlin_dies_at_age_23/