No centralized recruitment process or set of national standards exists for the 18,000 law enforcement agencies in the United States, many of which have deep historical connections to racist ideologies. As a result, state and local police as well as sheriff’s departments present ample opportunities for white supremacists and other right-wing extremists looking to expand their power base.
In a heavily redacted version of an October 2006 FBI internal intelligence assessment, the agency raised the alarm over white supremacist groups’ “historical” interest in “infiltrating law enforcement communities or recruiting law enforcement personnel.” The effort, the memo noted, “can lead to investigative breaches and can jeopardize the safety of law enforcement sources or personnel.” The memo also states that law enforcement had recently become aware of the term “ghost skins,” used among white supremacists to describe “those who avoid overt displays of their beliefs to blend into society and covertly advance white supremacist causes.” In at least one case, the FBI learned of a skinhead group encouraging ghost skins to seek employment with law enforcement agencies in order to warn crews of any investigations.
So the solution would be to create some streamlined recruitment process, or does that fall under "states rights" in the case of local law enforcement? Unsurprisingly, the South is cited for examples.