They usually give a phony name in any case.
4 seconds sound clip from the Dirty Harry 1 movie soundboard.
You can hear this line at 01:03:23 in the Blu-ray version of the movie.
Quote context
[...]
- It's Park Emergency. They just treated a guy who had a knife wound in the leg.
- Yeah, doctor? What'd this guy look like?
- Long blond hairs medium build, about 150 pounds. Pale complexion.
- He didn't give you his name, doc?
- Nope.
- They usually give a phony name in any case.
- But I've seen him someplace.
- Look doc, it's very important you try to remember.
- There's a 14-year-old girl who's suffocating.
- I'm trying to think! I'm trying to think!
- It was... I believe he works around here...
[...]