Government databases exist for information to be entered. Anything said at a traffic stop can be entered including; Phone #'s, passenger descriptions identifications, destinations, firearm serial #'s, are all subject to being entered. All of that info is subject to being shared. Why do you think I have intelligence reports written about me? Why have police agencies written advisory bulletins? I've done nothing wrong. My info is out there because cops took the info and put it into the database. They don't stop at traffic stops. They comb the internet too.
Taken from the DOJ LEISP:
To fulfill their objectives, law enforcement agencies conduct a number of activities to detect and investigate terrorist and criminal activity, including:
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patrol/traffic enforcement
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arrest/apprehension
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emergency response/incident management
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surveillance
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case specific investigation
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task force investigation
These core law enforcement activities are facilitated and influenced by investigative and analysis functions and managed through some form of a command and control function.
The most common contact the public has with law enforcement is interaction with patrol officers through traffic stops. These contacts often yield a wealth of information for criminal investigation and prevention purposes.
Although DOJ has limited patrol functions, other federal agencies (e.g., Park Police, Customs and Border Protection, DOD, and the Transportation Security Administration) have extensive patrol or related security functions. In addition, DOJ investigations rely on assistance from state and local law enforcement patrol functions to help collect information and identify the location of fugitives or suspects.
Patrol officers need several types of information to execute their routine responsibilities, to assist investigators, and to maintain their personal safety. They need access to information on wanted persons and stolen vehicles. They also need the ability to quickly and positively identify persons. To assist investigators or intelligence functions, they also need to know “who or what to be on the lookout for.”
Patrol officers/agents typically are provided information in one of four situations: pre-patrol briefings, notices or alerts while on patrol, as a result of queries they submit while conducting a stop (e.g. traffic, suspicious person), or in making an arrest. They also collect and report information to command authorities, investigators, and potentially to officers of another agency.
Information may be collected by patrol officers as a result of specific requests from others or self-initiated based on a suspicion of criminal activity, intuition, knowledge, or training. Information collected by patrol officers typically is documented in field interviews or suspicious person reports, preliminary criminal offense reports, or traffic citations.