Strange Snake in Southern Vietnam

A leucistic specimen of a native snake has become one Vietnamese family's pet. (New source.) I can't specifically identify the genus from the photo; from the shape of the head, and the fact it eats eels, it might be Cylindrophis. (The hand, held towards the camera, makes the snake seem larger than it actually is.) If I could see the tail, I could determine that quickly, as pipe snakes are fairly distinctive. I can't rule out a homalopsine, though, without better images.