I can't imagine he kidnapped her just to have a house mate. Ya, I imagined she was terrified to try leaving. I expected to read she was kept in a basement dungeon or chained to a wall or something, not that it took her 89 days to find a time when he left the house for more than a few minutes.
I don't know why they'd give this guy bond. He killed 2 people in cold blood so he could kidnap and rape their daughter. His guilt and life time in prison is all but a forgone conclusion. What would he lose by trying to flee.