She’s not actually a cop, as far as I can tell. It’s a little weird that the union would employ a civilian for the job, but not unimaginable.
I have police in my family. Every vendor they employ (dry cleaner, tax assistance, plumber, locksmith, etc) comes from recommendations within the policing community. They don’t take a risk to trust strangers.
BTW, "The Departed" [1] is a great movie about this topic.