如何分辨警察有無濫權?襲警的定義是什麼?

1. There is no clear line. But at the least, the police must be able to explain and justify the actions taken.

For example, if you are arrested, the police should be able to explain the reason you are arrested.

2. Assaulting a police officer in his/her course of duty. Please don't confuse with resisting arrest.