Why Are There No Asian-American Police Officers in Montgomery Township?

According to the 2010 Consolidated Annual Performance & Evaluation Report (CAPER), the population of Montgomery Township is 22.3% Asian; neighboring Lansdale Borough is 18.8% Asian; and neighboring Upper Gwynyd is 17.6% Asian. With the many Asian markets, stores and businesses in the area, many Asian-Americans come into the vicinity daily. I've witnessed a few interactions between white Montgomery Township police officers and Asian-Americans, and the white Montgomery Township officers have been patronizing toward the Asian-Americans, and worse. There are 39 officers and three staffers listed on the MTPD Website. None of them appear to be Asian-American. Given the racial makeup of Montgomery Township, why does it have no Asian-Americans on its police force?

The Los Angeles Police Department is showing progress by hiring Korean-American police officers. See http://www.koreatimesus.com/?p=1536. Why can't Montgomery Township do the same?