Every Contact Leaves a Trace

  • Locard’s principle: a perpetrator of a crime will bring something into the crime scene and leave with something from it.
  • But this principle, “Every contact leaves a trace,” applies not only to an investigating police officer but also to the fact that individual, interpersonal “contacts” can leave traces, both good and bad, upon people as a result of those interactions; therefore, this principle can apply to both forensics and police-community relations — the building of trust, and officer health and wellness.

Read more about the Madison Method HERE and in my book Arrested Development.


Sutherland can be followed on Twitter @policecommander.