“…The only operating standard is caveat emptor: ''Let the buyer beware'' (Devilly & Cotton, 2004;Lilienfeld, 2007). Given the absence of credible evidence in the refereed literature of medicine and psychology that standard CISM interventions provide clinical benefits and repeated suggestion that they may complicate recovery for at least some recipients, there has been suggestion in several quarters that the tide may have shifted to present actual liability on the part of the providers of such interventions (Devilly & Cotton, 2004) and EMS agencies that sponsor, much less mandate, participation (Bledsoe, 2003). It is incumbent on EMS managers, then, to acquaint themselves with current best practices according to what authoritative standards exist (see, e,g,, the guidelines of the Oxford-based Cochrane Collaboration regarding debriefing following trauma; Rose et al, 2007; see also the guidelines of the United Kingdom's National Institute for Clinical Excellence, NICE, 2005; those of the Australian Centre for Posttraumatic Mental Health, 2007; and the recommendations of the National Institute of Mental Health=Department of Defense consensus panel on early interventions following terrorism, Ritchie et al, 2002; see as well Devilly, Gist, & Cotton, 2006;Gist, 2002;Gray & Litz, 2005;McNally, Bryant & Ehler, 2003).…”