Most people don't understand how powerless police are to find criminals. That they catch them at all is often amazing. I have firsthand knowledge of this from a tragic loss in my family. The investigation was severely hindered because investigators could not utilize cell location data, despite knowing someone was present at the scene. Police spent an extensive amount of time trying to identify them without success. When the identity was eventually discovered through entirely different avenues, it confirmed the individual had a cell phone on them. The location data would have resolved the identification trivially. We should enable this capability and put strict "guardrails" on its use.