Unthinkable: An Airline Captain's Story (2014)

Marshall Philips has seen and written about things the intelligence community doesn't want people talking about - much less writing books about. When Philips, his two kids and the family dog turn up with a single bullet in each of their heads the day after two "Federal Agents" came looking for a "highly classified" photograph, carefully constructed stories painting Philips as a mentally disturbed "conspiracy theorist" begin appearing in the local paper. Investigative journalist Madison Freeman doesn't buy the "murder-suicide" angle offered by local authorities, but when the highly classified photo continues to elude the Agents, nobody is safe.