Well that's interesting. Sounds like someone changed your target or something? Especially since it specifically mentions Gunner. I can't remember if anyone has experienced this before though.
If the mafia did change your scan target to Gunner (and I can't really think why a third party/innocent would do that), then whoever you picked would instantly be suspicious. Obviously this is mostly speculation and doesn't clear Abby in the slightest, but I'm just trying to throw some logic in here.
Either way, I still think Naku is the higher priority to attack because of the damage he deals, so carry on.