Thought this was pretty much a given that Police Departments will have members of the community amongst the ranks.
It was just last year when everyone witnessed the amount of Militia members and White Nationalist present on Police Departments.
Since we are dealing with LA, it's not going to be a shock to anyone that gang members or individuals with gang affiliations are going to be members of the department.
In NYPD, you have everything from Chinese party members to militia members to gang members to members of the mafia.