I figure this question belongs here though it definitely has a legal counterpart to it. But since it's fiction and supernatural no less, I didn't think it would make sense to put it in a more legal-specific exchange. I'm sure the mods will let me know if I'm wrong :)
Some backstory: I'm a private detective (USA) working on a series of inexplicable, supernatural murders. At some point in my investigation a minor with ties to the case (an individual under 18 years of age) runs away from home. I manage to gain contact with this runaway (aged 16) and determine that if I send him/her home the case's culprit will kill them as well. I have evidence supporting this and this minor is essential to solving the case.
Now, technically speaking, harboring a runaway is a crime: https://www.criminaldefenselawyer.com/crime-penalties/juvenile/running-away.htm but once again, sending the kid home is a death sentence. Also, their parents have yet to file a report and the kid does not want to return home.
While, technically speaking, the witness protection program can force an unaccompanied minor (read: orphan) into the program, this kid has parents. Not to mention, I'm a PI, not a federal court so I can't exactly go forcing kids into the program anyways. On top of that, the nature of the killer is such that relocation would not actually help my client. They would still end up dead. (That said, if this was a normal killer the WPP would probably be the best place for this kid). CPS will run into the same thing.
So the question is how can I cover myself and still keep this kid out of harms way (preferably by moving them under my supervision)? Obviously, I'm more interested in keeping my young client alive and will cross some legal boundaries if needed, but I'd rather not lose my license (or end up in court) over it.