If you played Blackwell 4: Deception, you remember that there was some very ominous foreshadowing about the police commissioner, Alex Silva, who was apparently either a member of Gavin's spiritual vampire group or maybe its leader. In this game, she's still a threatening force for the first half of the game ... and then nothing. WTF?! you might be saying, as I did.
Well, if you play the game with the commentary track turned on, right after the interrogation scene, you can click on another commentary button in Rosa's apartment to play a deleted scene that would have let us meet Alex finally. You'll also hear Dave Gilbert explain why he changed his mind and took her out of the game completely.
The bottom line is that he changed his mind about the plot, and he's sorry about the foreshadowing thingie that turned out to be a red herring. Yeah, me too.