?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aulast=Roach&rft.au=Roach%2C+J.&rft.aufirst=J.&rft.degree=Doctoral&rft.inst=UCL+(University+College+London)&rft.tpages=266&rft.title=Unusual+suspects%3A+identifying+active+serious+offenders+by+self-selection+policing&rft.date=June+2009