This app was mentioned in 2 comments, with an average of 1.50 upvotes
Plugging Copwatch (Free, iOS) or Handsup4justice ($0.99, Android), sort of thing that's always handy to have available in case you get into a messy situation with the police because it uploads the recording straight to the internet, meaning that they can't just delete it and screw you over.
Hands up is another good app. https://play.google.com/store/apps/details?id=com.hufj.app.android&hl=en