Jim Frederick was an American author and journalist who was an editor for 'Time' magazine. In 2010, he wrote the best-selling book 'Black Hearts: One Platoon's Descent into Madness in Iraq's Triangle of Death', about the Mahmudiyah killings. Wikipedia*
On the C-SPAN Networks:
Jim Frederick has one video in the C-SPAN Video Library; the first appearance was a 2010 Forum.