As the workshop was locked from the inside, Ramirez had panicked and thought the victim was murdered by the ghost of the Mad Pilgrim. Antique dealer Desmond Galloway then revealed that he had found a letter to the team and Moss's housekeeper Adela Zhu helped them deduce how the killer killed Moss. Despite the various disturbances and clues that made Ramirez believe it was the ghost that murdered Wilhelm, the detectives found wealthy collector Patrick Rufio guilty for the murder.
Patrick admitted that he was getting poorer day by day. He then thought of killing Wilhelm so he could spread the rumor of the ghost of The Mad Pilgrim and make profit by selling the original portrait of it. Just as Wilhelm finished the Pilgrim's eyes, he released an ampoule containing a quickly-degrading neurotoxin into the locked room through the window to give the illusion of the Pilgrim killing the painter, thereby increasing the value of the painting. Rufio's heartlessness caused Judge Hall to sentence Patrick to life in jail for the murder.
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