No one has mehe number mentioned it, but Neri as Michael's number one guard and protector was indirectly responsible for the security lapse which allowed someone to open the drapes.

"Io sono stanco, sono imbigliato, and I wan't everyone here to know, there ain't gonna be no trouble from me..Don Corleone..Cicc' a port!"

"I stood in the courtroom like a fool."

"I am Constanza: Lord of the idiots."