His spokesman Andrew Wyatt gave a rare interview, describing the disgraced comedian's life in prison.
"Bill Cosby took my beautiful, healthy young spirit and crushed it," Constand wrote.
The comedian's sentence for drugging and sexually assaulting Constand is expected to be handed down Tuesday.
Here's how the women who came forward reacted after Cosby was found guilty.
Prosecutors say the admission helps establish a pattern of serial sexual abuse.
The former model testified she was warned that revealing the assault would ruin her career, so she left it out of her book.
Bill Cosby the first major figure on trial for allegations of sexual misconduct since the Weinstein effect and the growth of the Time’s Up and Me Too movements.
She's one of five women prosecutors are allowed to call as witnesses to "prior bad acts."
Widespread disregard for sexual assault victims makes prosecuting their alleged attackers incredibly difficult
In a statement with lawyers, Andrea Constand thanked prosecutors and police.
Cosby's accuser had never before spoken publicly about the alleged assault.