The beauty pageant star, 30, was found dead in New York City on Sunday.
She was pronounced dead after falling from her high-rise apartment.
Medical examiners conducted an autopsy Monday and a day later her death was confirmed a suicide, PEOPLE reported.
Kryst’s death was confirmed by her family and colleague Billy Brush branded her passing as a “complete shock to us all”.
The beauty pageant queen also worked as a correspondent for Extra.
The company said: Our hearts are broken. Cheslie was not just a vital part of our show, she was a beloved part of our Extra family and touched the entire staff.”
Erwyn Diaz, a videographer who worked with Kryst for about four years, told The Sun: “She set the standard for all women in America.”
Her friend and publicist LaToya Evans posted a picture with Kryst on her personal Instagram with a touching tribute and personal anecdote about the late model before the Miss USA competition.
Evans said: “I’m awestruck and heartbroken. When I spoke with her a couple of days ago about a BIG upcoming story we were working on, she was happy-sounding as always. I could hear her smiling through the phone.”
Kryst lived alone in her plush apartment located in the Hells Kitchen neighborhood of Manhattan after moving in last September.
Less than a year before her death, she revealed that she spent eight days in the hospital and wrote about “running out of time” in a chilling essay.
The ex Miss USA winner penned a heartbreaking piece about turning 30 where she discussed her struggles with aging, her work ethic, and her search for purpose.
Kryst wrote: “Turning 30 feels like a cold reminder that I’m running out of time to matter in society’s eyes – and it’s infuriating.”
The beauty pageant winner said she “cringed” at the thought of reaching the age.
Kryst is said to have left behind a note saying that “she wanted to leave everything” to her beauty pageant mom.
Police sources told The New York Post that Kryst left a note behind for her mom April Simpkins, who was awarded the gong of Mrs. North Carolina United States in 2002.
The beauty pageant winner previously said her mum had inspired her.
She said: “My mom is my role model. I always look up to her and ask her for her advice.”
Hours before her death, Kryst uploaded a chilling post on Instagram of herself captioned: “May this day bring you rest and peace.”