George Kelling was a criminologist whom the Kansas City Police Department hired in the 1970s to test whether O.W. Wilson’s preventative patrol method of policing could effectively reduce crime. Ultimately, Kelling’s experiment failed to establish preventative patrol as an effective means of reducing crime. Gladwell explains how this failure was due, in part, to Kelling’s failure to account for where the majority of crime took place—his preventative patrol failed because he did not send additional patrol units to a focused area known for its higher rates of crime.