> If you do decide to withhold evidence as the victim, you could still be charged with obstruction of justice
Do you have examples of this happening? I'm very skeptical. Prosecutors are political animals. Prosecuting a crime victim just feels like a losing position. If "testify or jail" worked you wouldn't need witness protection programs.
> It is not up to any witness whether the case should proceed or not.
No doubt. Best example: homicide. Always investigated and prosecuted even though the victim isn't around.
But say your house is burgled. Your neighbor, a cop, knows it happened. If you refuse to let investigators in to dust for fingerprints, will the case go anywhere? Will the DA really charge you with obstruction?