The Boys Who Cried Wolf

Wan-ju, once dreamt of becoming an actor now works at the role play agency for living. He gets paid for playing a fake role such as a boyfriend, a neighbor or anything asked. One day a woman visits and requests to be a fake witness of her son's murder case. Wan-ju senses big risk but when the client asks with tear to put the suspect in jail, he accepts the offer. Once again he does his great job and finishes the police reporting, but when he leaves the police station he discovers the victim was an orphan... Who was the client?