http://www.bbc.co.uk/blogs/opensecrets/2006/12/amnesty_ineffective.html
Martin Rosenbaum
"As the BBC has been reporting the recent Police knife amnesty seems to have had no significant impact on knife-related crime. This is according to an assessment we obtained from the Metropolitan Police under freedom of information. We also obtained a Met Police review of the national gun amnesty held in April 2003. This provides a similar picture of the amnesty not having a significant impact on crime levels."
