This skill covers all criminal activities.
It covers both the use of and theoretical knowledge. So a detective needs a crime skill too, so he can figure out what has been done how.
Also if you want to build security systems, you need to know how a criminal would go about business to create useful countermeasures.

Some examples of specialisations:
  • Disarm Traps
  • Disguise
  • Escaping bonds
  • Forgery
  • Hide
  • Investigation
  • sneaking around
  • picking locks
  • picking pockets
  • Lip reading
  • Shadowing
  • Sleight of hand
  • Computer hacking
  • Building and use of simple explosives
  • Securty systems