A jury found Stefan Sylvestre, the man who threw the acid, left, guilty of causing bodily harm. He received a life sentence, with a minimum of 12 years in prison. Danny Lynch, Piper's former boyfriend who orchestrated the attack, right, was sentenced to two life sentences, and will serve at least 16 years in jail.
Watch "20/20" Friday to find out what secret Katie Piper was forced to keep
(ABC News)