Who is Caroline Ellison, a key witness testifying against Sam Bankman-Fried?

Caroline Ellison, a former employee of cryptocurrency hedge fund Alameda Research, testified as a key witness in the fraud trial against its founder, Sam Bankman-Fried. Ellison, who became Alameda’s co-chief executive and later assumed full control, pleaded guilty to fraud charges and agreed to cooperate with prosecutors. She admitted to helping Alameda.