Anything that is not reimbursed by your dept and is required or used for work is deductible. Make sure you have receipts for all items that you are claiming. You'll need unreimbursed business expenses to exceed 2% of your AGI in order to take a deduction. Items such as your locker at home can be deductible if it is required by your dept and not reimbursed.
A few other things you can deduct that you might not have thought of are
-training classes you paid for but where not reimbursed though your dept
-mileage for your personal vehicle if it was used to go to a training class or special assignment
-union dues
-if you are required to drive your dept car home and store it in the garage, you can deduct a portion of your home mortgage interest or rent that is proportionate to the size of your garage. If you own your own home, split the mortgage interest between unreimbursed business expense and mortgage interest on your schedule A. You'll also get to deduct a proportionate percentage of your homeowners insurance under unreimbursed business expense.
That's all I can think of right now, I'm sure you can find more. The important thing is to have documentation of your deductions.