Part1: My mom was sentenced to die for killing my dad, and for six years, no one believed she was innocent. But minutes before the execution, my little brother hugged her and whispered: “Mom… I know who hid the knife under your bed.”

Inside the secret drawer of my father’s wardrobe, there was a photo. It was an old photo, creased at the corners, stained by moisture, with a date written on the back in blue ink. I...