Duty Bag

Do you have a local cop shop? The Galls and 511 patrol bags run about $40-50 online plus shipping. I found the same bag locally a few years ago for $40 with the dept logo stiched on. It was on sale because they were selling the bags in bulk to our academy class. I bought it and still use it, but it's basically a buff bag. It has extra room that I don't need, although I've found random items to put in that I rarely use.

You might also consider using a regular bag. What you feel is necessary to take with you dictates the size and style of bag you'll need to carry. I suggest an accordian folder with necessary paperwork (domestic & accident reports, depositions, etc). You should also have a map book, "cheat sheet" book with commonly used law codes, flashlight and search gloves. Side pockets can carry your ticket book, notebook, pens, extra ammo and batteries. There isn't anything else off the top of my head that you absolutely necessary to take with you. I know a lot of cops who make are satisfied with a backpack.

Whatever bag you use, seatbelt it in. You don't want that thing flying at your head if you have a collision.