In APCO 10-codes, 10-66 refers to "Suspicious Person."
This code is used by law enforcement and emergency services to indicate that there is a person acting suspiciously or behaving in a manner that may warrant investigation.
For example, a communication might occur as follows:
- Dispatcher: "Unit 4, please respond to a 10-66 reported at Main and Second."
- Unit 4: "10-66 acknowledged, en route."
Using 10-66 allows officers to communicate efficiently about potential threats or suspicious activities, facilitating a quicker response and coordination among units.