Captain Marvelous said:
Or tracing calls isn't as simple as you assume.
I'm actually kind of curious about this. I'm quoting you, but I realize you might not know any better than I do. What kind of information would the police get out of tracing a spoofed call (As was probably done in this situation)? I know that the hollywood trope of tracing calls is inaccurate, it can be done instantaneously, but I don't know what sort of accuracy you get out of it. I also don't know what measures someone can take to hide their phone's location.
While I'm sure that you could hide it in such a way that you couldn't tell exactly where the real caller was coming from, but could you hide it in such a way that it appears to be coming where it plausibly should be? If not, that should be a bit of a red herring in a situation like this. Not enough that you don't take action, but enough that you don't go in guns blazing and try to assess whether there's real danger or not first.