It really does depend on the type of help that they are asking for, if they are asking you to do something illegal I would need to know a little bit more to make sure of two things, number one they had not crossed the line which is murder or peadaphil activity, two to see if there was a way of helping them without performing an illegal act.

Other than that if they seemed or felt as though they did not want to tell you I would have to trust in their judgement and if I was able to I would help.