Since the Division 1 and 2 investigators saw the Chief override a Dominator to put it in Destroy Decomposer mode, there's no way they're walking out of this situation without thinking something is fishy, right? Particularly if Akane puts two and two together since Kougami suggested Kagari was eliminated in a way that wouldn't leave a trace. Well, I guess they could shrug it off and think Nobuchika's was broken...
The Chief angers me quite a bit now, particularly due to how she/they are using Kagari as an excuse to whip everyone around. I'd really like to see some comeuppance against Sybil and soon. I don't like the way they were eyeing Akane after she shot Kougami, too. Hopefully they're not looking to scout her as one of them.
So I'm guessing Yayoi saying she was going to grab a bite to eat was actually code for something else, if Shion got word of Kougami so quickly (and unofficially)
Overall a slower episode, but you can tell everything's going to hit the fan after this.