East China police have reported that their micro blog along with the aid of some 10,000 bloggers have managed to identify and arrest the killers of a 3 year old baby girl.
A picture of the young girl’s body posted on the police site on 23rd November generated 2000 comments plus 100 pages of useful information which lead police to the home of the girl in neighboring Jiangxi province.
The girls parents were promptly arrested and later confessed to the murder of their daughter.
You have more useful info than the British had coloines pre-WWII.