and tonight, a u.s. senator, marco rubio, has called his death murder. back on american soil, inka pass tated after 17 months in a north korean prison. his father's first words to his son. >> what did i say to my son? i knelt down by his side and i hugged him and i told him i missed him and i was so glad he made it home. >> reporter: but the 22-year-old was in a state of unresponsiveness waitfulness, damaged throughout his brain, rendering him able to brink and at times move, but there was nothing left of the adventurous young than that had departed nearly two years earlier. >> otto, i love you and i'm so crazy about you, and i'm so glad you're home. you are such a great guy. >> reporter: the north korean government claimed that warmbier contracted botulism, took a sleeping pill and fell into what they call a coma. a north korean mri confirmed the