Cant find Lev Nikolayev - Manhatten

[Cant find Lev Nikolayev - Manhatten]

I've actually managed to kill the bomber without him blowing up the house when I approached from a different angle but then nothing happens. Coops doesn't radio a thing in and no one can leave or enter the house, so it seems it truly is impossible to arrest this guy no matter what.

[Valentina (Spoilers)]

Can anyone tell me where to find Dr. Sova? Valentina tells me which village, but when I go there he is nowhere to be found. Knowing this game, I don't know if its yet another bug and I should re-start (yet again!) or if its actually possible to find him.