Wouldn’t most of them be 911 calls?
My LEO has been using GPS for at least 10 years. Call 911 from a cell and hang up, a cop is there in minutes.
And that dude testifying/answering the question ‘can you listen in on phone calls?’ Please. Back in the 80s if someone had a landline without call waiting you could pay the operator $1.65 to break in on an emergency call to tell them someone else needed to talk to them.