Sixty police and sixty non-police mock jurors read a fictitious transcript describing how an attempt at blowing up the Channel Tunnel was undertaken and how a bystander was injured by the fleeing culprit. The expert forensic and eyewitness (i.e., psychological) evidence presented in the transcript was either reliable or unreliable (such that there were four possible combinations). Two control transcripts contained expert forensic evidence only (reliable or unreliable). Police officers from Bridgend and Cardiff Central Police Forces and non-police solicited from the universities of Cardiff, South Wales and Sussex acted as 'mock' jurors and rated defendants for guilt and extent of guilt whilst considering evidence most influential in their decision-making. The aims of the current study are therefore to test whether police have a more informed understanding of the reliability and validity of both forensic and eyewitness evidence than non-police mock jurors and, that they are more sceptical of expert eyewitness testimony. The statistical analyses, MANOVA and Jonckheere, showed that police and nonpolice mock jurors have difficulty differentiating between reliable and unreliable evidence for the count of hitting the bystander. For the count of 'blowing up the tunnel', non-police mock jurors appear to be utilising evidence consistent with its reliability; however, MANOVA and Jonckheere analyses failed to demonstrate this statistically. Findings are accounted for by Hastie et al. [1]. 'Story Model' of how jurors interpret information and simplify meaning to help inform their verdicts.