Murder of US general raised questions about insider attacks in Afghanistan

Mark was interviews on Fox News by Shepherd Smith after an Army general was ambushed and killed and eight other American soldiers were wounded by an Afghan soldier, raising concerns about insider attacks in Afghanistan.  Mark explained that the challenges conducting an investigation in hostile non-permissive environment.  Mark expressed concerns over the insider-threat and cautioned against downsizing counterintelligence and force protection assets, as we downsize the larger forces there.