In 2018, a decorated U.S. Navy SEAL was arrested and accused of some shocking crimes. Investigators said, while Eddie Gallagher was leading a platoon of these elite commandos in the battle to retake Mosul, Iraq from ISIS, he stabbed a defenseless prisoner to death. The accusations came from SEALs in Gallagher's own platoon, who also said he was known for taking shots at civilians from his sniper's nest, and killing at least two. We talk with 'New York Times' correspondent Dave Philipps, who covered Gallagher's trial and interviewed many of the Navy SEALs who leveled the accusations against Gallagher. His new book is 'Alpha: Eddie Gallagher and the War for the Soul of the Navy SEALs.'