Television shows like Cops and Law and Order make a decent attempt at depicting reality. But, if you really want to know the true reality of police work you should participate in the Idaho Falls Police Department's Citizen's Police Academy.
This free class gives residents an inside look into the inter-working of law enforcement as they learn about traffic stops, accident investigations, Unmanned Aerial Systems (UAS), firearms, less lethal, use of force, forensics, K9, patrol procedures, EVOC, Bomb disposal, and SWAT.