By Clive Coleman
Legal correspondent, BBC News
Police investigators who view disturbing images online are experiencing PTSD, anxiety and depression.
By Alys Harte & Sally Chesworth
File on 4
The BBC has seen some of the online messages received by an investigator who poses as a 14 year old girl online.
Barrow's Conservative MP Simon Fell says he's concerned about tensions in the town following claims of abuse by an Asian grooming gang.
Cumbria Police said a team of detectives found no evidence of the allegations during a year-long inquiry, but tens of thousands of people have signed a petition calling for a second investigation.
Takeaway premises were vandalised in the town at the weekend, and three men were arrested on suspicion of racially-aggravated offences.Copyright: BBCQuote Message: I am concerned about the way things are going in Barrow at the moment, tensions are very high, so what I would say to people is, keep calm, please remember there is an ongoing police investigation here." from Simon Fell MP for Barrow and Furness
By Mike Thomson