I didn't have a lot of time to devote to this, but Tuesday morning, I produced a little analysis of our data in Lincoln on assaults of police officers, dating back to 2001. There have been 826 such assaults as of midnight Monday. A healthy percentage of these (18%) have occurred at a handful of institutions:
72 Cornhusker Place Inc. (detox center)
42 Bryan LGH Medical Center West
19 Lancaster County Jail
7 Group hope for teenage runaways
6 Hall of Justice/Law Enforcement Center
Another 60 assaults occurred within two blocks of 14th and O Streets--the bar district in Lincoln that caters predominantly to the young drinking crowd.
We collect a two-digit location code on all crime reports, that describes the type of premise. Here are the premise types with 10 or more assaults:
75 Correctional institution or treatment center
96 Apartments with 7+ units
74 Single family residences
17 Public high school
16 Apartments with 3-6 units
11 Grocery store
10 County-City Building complex
There is not only a strong spatial pattern in assaults, but a very strong temporal pattern as well. From the map and the chart below, I think we can safely conclude that alcohol contributes markedly to the risk of a police officer being assaulted (click to enlarge).