^^ Pretty sure you are not allowed to take pictures or record police without permission.

So long as you make them aware that you will be recording, this should be fine.

Complaints:
1. Make it known to officer(s) that you're not happy and on what grounds (only if possible- you don't want a battern up your ass etc)
2. Police station that officers are affiliated with
3. Police department complaints (as already stated)
3. Ombudsman (if they still aint listening- and you want to get away from the 'boys club')
4. Crime and corruption commision (for really serious stuff)

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