As soon as they are entered into the program and relocated, they are introduced to a witness protection coordinator in the area where they have been relocated. That witness protection coordinator will then look after that witness in a decreasing amount as time goes on; we want them to become self-sufficient.
They will be provided with a covert 24/7 telephone number that they can contact at any point in time. They're not contacting police; it's a covert number. They can contact the coordinator to deal with any issues that may come up.
As you can probably predict, there are lots of issues in the first days, weeks, months. The issues decrease as time goes on, as people become self-sufficient.