supersleuth       
noun [ C ] (also super-sleuth) uk/ˈsuː.pə.sluːθ/ us/ˈsuː.pɚ.sluːθ/
 (尤指书籍或电影中的)超级侦探
someone who is very good at solving crimes and finding out who is responsible for them, especially a character in a book or film
  Henning Mankell is the creator of Swedish super-sleuth Inspector Wallander. 贺宁·曼凯尔是瑞典超级侦探沃兰德探长的创造者。 
 She plays the part of a teenage supersleuth determined to find out who was behind the murder of her best friend.
 - More examples
 - The novelist wrote over 30 books featuring the famed supersleuth, a clumsy private investigator with a taste for bourbon.
 - Suddenly the entire neighbourhood turned into supersleuths trying to locate the child's missing bicycle.
 - It was fun to play supersleuth and try to decode the cryptic message that had been spray-painted on the rock.