Soooo I got something for you, man. Don't think it'll be much help. But.
[Location address] - supposed to be a former safehouse used by this particular flavor of mob as recently as late last year. But whoever was there was taken in by NYPD in some sort of deal.
[Location address, apartment number] - Sytsevich's apartment address as recently as two months ago, but there's stuff going on that makes me think that they're cleaning it out to get it ready for a new tennant. He hasn't checked his mail there in about that long.
[Restaurant location] - place he eats at a lot. I mean, he still goes there. He was there just the other day, a grocery store next door had some security cameras I was able to hack into. Then I found out that NYPD had talked to them, too, and I got a copy of the video they pulled from the store's feed. You're welcome.
[Location; Location; Location] - ex-girlfriends, one of them has a restraining order on him.