Where is the evidence that Madeleine's parents are involved in her abduction?

While I agree it is very sad, I think you are spending far too much time obsessing over it, judging from your recent questions. You can't control what happened and the end results. You can only control how much media coverage over it and obviously you're watching (and reading) way too much. You need to get on with your own life. What you're doing is very unhealthy.