that i thought there was glass. reporter: anello is fighting a negligent homicide charge. in july, 18-month-old chloe wiegand was with her family onboard this ship. abc reviewing surveillance video showing the tragedy unfold. he s the first to get, you know, look over the railing and down towards the port. correct. reporter: he then picks her up and stands her on the railing. yeah. reporter: they kind of lean over, he readjusts yeah, i think he sits her down. reporter: sits her down and then they look again. reporter: lean over again, and she disappears off. the wiegand family deciding not to make that video public. anello says this never would have happened if he knew the window was open. abc has reviewed medical documents diagnosing anello as colorblind. i m colorblind. i don t know. i just never saw it. i ve been told that that s a reason that it might have happened. there s nothing worse that they can do to me than what s already happened. reporter: he