Tian Chua's arrest!

Is the police right to arrest Tian Chua the way it showed on video clip? What has he done wrong to deserve the arrest like the way he did? I think police force is over stepping the line and started a war against peace and harmony.

From the video clip viewed, Tian Chua has done nothing, but sitting inside the car driven by his driver or friend, and he did nothing more than heading towards Parliment house. Is that deserve to be arrested? Is there any law prevented a politician entering parliment house?

Surely I think police is making use of the chance to try showing what they intent to do should the street demonstrators started marching towards parliment house. And worse is Tian Chua was pulled out from his car and being hand carried into a police car, when he did nothing more than speaking and answering to police's question. Also police do not obtain any sort of warrant to arrest Tian Chua, as well as anybody around the area.

Some policemen even try to prevent reporters from taking photograph, and pushing reporters away so no photo could be taken and no evidence will be published against them. I think these policemen not only thirsty at times, but they like acting cowardly in public so that thief and/or robbers will be afraid of them