"Let me tell you a story. Some protestors came. We let them in and then we closed the road, we closed the entrance, we closed the exit. When they were stuck in the middle we killed them all," he recounted.

"Then a (rubbish) truck from the army came and collected them all. Then street sweeper machines went past. They opened the road again, as if nothing had happened.

"The students are dead, it is more convenient. For kidnapping you get 160 years, for killing its 35. It's a huge difference, don't you think?"