A partisan police force
It appears the police of Bangkok are merely an arm of the Pheu Thai government, devoid of professionalism or credibility.
At least this is how anti-government protesters view local law enforcement. Who can gainsay this opinion when live ammunition is used by the police against rioting protesters. Then there was the police force's refusal to protect protesting students from rampaging red shirts at Ramkhamhaeng University. I also get the feeling that if not for Bangkok police's tacit understanding that if they go too far the military will oppose them, there would be far more dead protesters. So perhaps it is time for the police of Bangkok and its vicinity to treat detained protesters as prisoners of war, with all the rights that the Geneva Convention affords them. An even better idea might be for the police to stand down and let the military take over their duties in regard to protesters.