Chaos:
I agree that individual moves within a turn cannot be viewed as simultaneous since one piece vacating a square allows another piece to subsequently move to that square the same turn.
As such, it is consistent for a spy to identify a piece moved adjacent to it prior to its capture that same turn. It is also consistent for a spy to move adjacent to a previously unidentified piece, another piece capture that one subsequently the same move and that captured piece show up upon submittal in the capture list with its identity revealed.