Mary is the maid of Lord Sinclair and his family at Sinclair Mansion. She discovered the master's body when she brought him his dinner. During the  investigation, she suspected Frank as she'd heard him arguing with his father. She dislikes the  Sinclair Guard dog.
Anna was arrested and tried for the murder, Mary was called as a witness. She stated that she saw one of the male Sinclairs leave the crime scene and couldn't provide any evidence that proved Anna did the crime.
Guard, " Murder Mystery", RuneScape. "Well, it's all very mysterious. Mary, the maid, found the body in the study next to his bedroom on the east wing of the ground floor."
Mary, " Murder Mystery", RuneScape. "Oh I don't know... Frank was acting kind of funny... After that big argument him and the Lord had the other day by the beehive... so I guess maybe him..." ^
Mary, " Murder Mystery", RuneScape. "Oh that horrible dog is always barking at noting but I don't think I did..."