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1. Blocks Engineer - Yashchurik, Travis - Loken.
2. Checks, surveillance, etc. - ?
3. Protects Guardian Angel - Wolfi.
4. Kills N.L. - Shamrock.
7. Kills Tactical Infiltrator (?) - Kaito.
Colonel Clive Fisher
Coordinator
Engineer - not Yashchur.
Scout
Scout
Rescuer
Tactical Infiltrator
Devastator
Guardian Angel - not Wolfi, not Yashchur, not Loken.
Emanuel, the Boss - Kaito, dead (?).
O'Brian, the Viper
Shadow Walker
Pegasus
Mechanic Prowler
Scavenger
Nigel
Travis - not Loken.
N.L.
Wyrm
Shamrock could have been the killer, or he could have been, say, someone else who just happened to be passing by. Although, it seems that all the displayed neutral districts have appeared. I wonder, if a scout whose neutral district is not displayed had died, would Revenant hint at who it belonged to?
Kaito is most likely the boss of the first mafia, which is a good thing. In any case, I don't have any better ideas regarding his role.
At first, I thought that Wolfi was protecting the rescuer, but his neutral district is not displayed, so I corrected myself.