Victims do, indeed, leave their violent circumstances, only to return afterwards. Some are able to leave the situation for good, after taking legal steps, while others are unable to file a complaint out of fear.
I agree with what Ms. Nepinak said about the challenge of staying in contact with victims who return to remote communities. You can't put the victim's safety at risk by calling them at home, for instance. The victim has to be the one to set up a channel for communication. Similarly, I would say every shelter relies on the social worker in the community to provide that ongoing support.