For example, if you become separated from a child in a crowd, you can hail a passing police officer or call 911. In non-emergency cases, you may wish to visit your local police precinct. It is helpful if you can provide a recent picture of the missing person and a description a what the individual was wearing when last seen. For any crime in progress, call 911. It is helpful if you first provide an exact location, then details of the crime including, if possible, a description of suspects and victims involved.
Callers remain anonymous.
Police officers who prove themselves in investigative assignments may be promoted to the rank of detective. In New York City, an investigator starts out as a detective third grade. Subsequent promotions to second and then first grade are based on experience and accomplishments. Detective, who work in plainclothes, investigate crimes and incidents. They interview victims and witnesses, collect evidence and interrogate suspects in a continual effort to solve crimes and arrest perpetrators.