L.A.S.D.

The Los Angeles Sheriff's Department, or LASD, is the second largest transit police force in the nation - aside from the N.Y.P.D. - through policing contracts of the Metro trains and buses of the Los Angeles Metropolitan Transportation Authority and Metrolink.

Furthermore, with policing contracts with nine campuses of the Los Angeles Community College and Lancaster Community College District, the LASD is the largest community policing agency in the United States. The department's headquarters are in Monterey Park.