http://news.bbc.co.uk/1/hi/uk/4457402.stm
Jon Silverman
"As former Met Police Chief Lord Stevens calls for the death penalty to be reintroduced for police killers, BBC News examines the deterrent effect of punishment. "
See report previously listed in InfoAlert - Rethinking Crime and Punishment - 2004
PDF - http://www.rethinking.org.uk/informed/pdf/RCP%20The%20Report.pdf