Port Authority officials said Anello sat the girl in the window and lost his balance, and the girl fell to her death.
The family attorney "says the video that he showed us was the same format he received from prosecutors," Begnaud added.
Noting a discrepancy in how long Anello was holding Chloe, Begnaud said, "the grandfather actually looks out the window for about eight seconds.
"Not knowing that there wasn't a glass there, if somehow I thought that she was going beyond the glass, I wouldn't have done it.
The chargesIn October, Anello was charged with negligent homicide in his granddaughter's death, Puerto Rican authorities said.