Quote Originally Posted by JMA View Post
... and how many committed such acts of violence before a combat tour?
I can’t immediately find the text of the study, but I did find a 2011 study lead-authored by Dr. MacManus. From p. 5:

Interestingly a pre-enlistment history of A[nti-]S[ocial]B[ehavior] was not significantly associated with being deployed to Iraq in this study. However, it was associated with spending on average more time on the deployment in the past 3 years, serving in a combat role and being more likely to discharge a weapon in direct combat. This implies that those with a history of ASB may be more likely to be selected into the infantry which would increase the likelihood that they will be in direct combat situations and thus be more likely to have to discharge a weapon in combat or it may be hypothesised that they may have a lower threshold for violence in the combat situation.