While talking to Dexter during the prison visit, Sirko says his great uncle was hung. This is a common mistake: pictures are hung; people are hanged.
Before Dexter goes into the bar, there is a blue Sunset Blvd (Los Angeles) street sign in the distance.
Dexter is looking at Isaak Sirko's file on his computer in the motel room, which is written in both English and Russian (with grammar mistakes, of course) but not in Ukrainian, which is the only official language in Ukraine.