If it were someone from the colony, I think Victor would have recognised them easier. I still believe he recognises the picture from someone he encounteted prior to z-day, and the revelation will out the truth about his real job and circumstances pre z-day.

As for Datu, its kinda odd that he wasn't killed whereas Glenn and the other guy were. Either the assailant (was it a little one?) wanted to keep him alive for bait, or recognised a degree of immunity in him, only time will tell. Shame we have to wait so long.