The death of Cheslie Kryst has spurred an outpouring of emotions around the world, as well as sparked a conversation about mental health awareness.

Now, Kryst’s mother is publicly sharing that her daughter privately battled depression — an inner struggle that she did not disclose with even her family and friends.

“I have never known a pain as deep as this. I am forever changed,” Kryst’s mother, April Simpkins, said in a statement.

“Today, what our family and friends privately knew was the cause of death of my sweet baby girl, Cheslie, was officially confirmed,” Simpkins’ statement continued. “While it may be hard to believe, it’s true. Cheslie led both a public and a private life. In her private life, she was dealing with high-functioning depression which she hid from everyone — including me, her closest confidant — until very shortly before her death.”

An autopsy this week officially confirmed Kryst’s cause of death.