It was a good watch but the End doesn't justify the situation. It seemed as the writer wanted to impose this end for nothing and just to shock the audience for nothing. It doesn't seem to be a logical conclusion. It appears as if the writer just wants the end of the movie may become the talk of the town. It's a big deal even for the police here in the UK to kill a human being. Police force of the UK has been made a villain and it has been shown that they can kill anyone only on the basis of suspicion. However, in reality, it is not so. This situation has been created to make end of the movie sad, shocking and finally to make a feel good movie a bad one.