Editing Trail of Cthulhu (section)

===Investigation===
If a player enters a location where a clue can be found, he needs only declare that he is using an investigative ability, such as Library Use or Forensics. If a clue is vital to the plot then he finds it automatically simply by using the correct ability. If a clue is not vital but merely useful, he can spend points from his skill pool to obtain it; these points do not refresh until the end of the adventure.