On the afternoon of March 12, 2014, Jennifer Collins checked her phone and found a message from her husband, Dave Collins, a retired Navy SEAL. He’d texted to say that she should pick up their son from kindergarten, and then this: “So sorry baby. I love you all.” Hours later, two police officers showed up at their house in Virginia Beach with news that Dave, 45, had shot himself in his truck a few miles away. Although Jennifer had held out hope for any other explanation, she also knew the moment she read it what the text meant. For months,...