FTR, if something bad happens to me, I don't really want Al Sharpton or Jessie Jackson to show up.
Not for this thread, but they usually only show up when they are asked by victims' families.

Yes, you need to "invite" them the same way you have to "invite" a vampire into your house, but that doesn't mean they don't ring the door bell.
"Hello, I understand your son was just killed by the police. Your son is black, right? Not jewish, right? Would you like us to come visit in your time of need?"