The police were trying to cover up the alleged murder and protect the suspect (someting that is very very common in India)

BEIJING: Rioters in southwestern China torched government buildings and cars after anger over a probe into a schoolgirl's death exploded into violent protests, locals and state press said Sunday.

The riots occurred Saturday in Guizhou province when protesters ransacked three government and police buildings after the girl's uncle died from an alleged beating by police trying to stop him from protesting against the handling of the case, locals and Internet postings said.

full details at http://www.RoguePolice.com/chini.htm