“…Although we know a lot about eyewitness memory in general-four decades of research provides a number of insights as to what might have produced a faulty memory of Alan Crotzer -it is fair to say that we do not know much specifically about eyewitness memory for multiple perpetrator crimes. We do know that multiple perpetrator crimes are prevalent around the world and that such crimes are among the most difficult to solve (Dauvergne & Li, 2006;Liem et al, 2013). We also know that nearly two-thirds of surveyed U.K. police report issues and confusion in conducting multiple suspect identification procedures, that eyewitness identification accuracy tends to decrease as the number of perpetrators increases, and that adapted lineup procedures attempting to address this 1 Not their real names identification have had limited success (Hobson, Wilcock, & Valentine, 2012;Horry, Halford, Brewer, Milne, & Bull, 2014).…”