So if the group wasn't speaking with the criminal, didn't intend to work with this criminal, then you're saying that at some point during the 24 hours the group has got to move so they don't look like they're aiding, or risk a warrant.

You're second part also concerns me, since you're now taking the position that "aiding" can literally just mean them standing on eastern and looking at you from afar. If you have evidence that they plan to assist, sure. But if they never intend to strike you if you engage the criminal, then you're risking just warranting them without certainty. Which leads me full circle back to beyond a reasonable doubt.