I agree that some cops won't give you a hard time about having to secure it in a locked compartment in the ambulance in case of life, limb, or sight emergency that requires a load and go mentality, but keep in mind there will possibly be jerks in the police department as there is in all walks of life. Use your best judgement, and hell, if its a severe enough situation that you just load straight into the rig with a quick trauma assessment you might not catch it until you do a thorough secondary exam. Giving it over right away might not always be an option. Now i'm going to talk to my boss about possibly hosting a firearm safety class...
That's why all EMT's should get their LTCH, to comply with the law!