Hastings died while he was investigating "socialite" Jill Kelley, who was linked to Petraeus and practically the entire CENTCOM staff and defense contractors - for whom she held numerous wild parties at her mansion. Not far fetched to believe some of those powerful people did not want details of these parties or other social or financial relationships to be made public.
General David Petraeus kisses Jill Kelley after accepting community service award presented at Kelley's home during the summer of 2011. It was later revealed Kelley, of Lebanese descent, was millions in debt, and had questionable ties to Middle Eastern entities.