I don’t understand the logic in keeping the video quiet just because it would give Sami a motive. It would also give credence to Bernardi being a dirty cop also and make it much more believable for him trying to kill Rafe. All Sami has to do is say that she saw Bernardi talking to Stefano and showing him what he had in his briefcase and that’s why she was trying to get it away from him because she heard him telling Stef he had stolen the evidence.
Also, don’t those three Bozos (Chad, Sonny and Abby) realize they are committing a felony by withholding evidence? It’s not just a moral thing, it’s a legal one too.