In a dank basement behind the local supermarket, metal bars cordon off a corner of the room to form a large cell. Dirty sleeping bags and duvets show three sleeping spots on top of sheets of Styrofoam for insulation from the damp earth floor. In the corner, two black buckets served as toilets. A few meters (yards) outside the barred cell, three dilapidated chairs stand around a table, cigarette butts and empty husks of pumpkin seeds littering the floor around them. Ukrainian authorities say this was a makeshift prison where Russian forces abused detainees before Ukrainian troops swept through the...