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Until the VOP detainer is lifted, he will not be able to get bailed out. As such, if the issue is with Orange County, they are the ones who have to resolve this. If there was a VOP issued, you should contact the probation office up there and have them look into the issue and provide them with the information you have, to show that the wrong violation was filed, on someone who was not related to the case. The county which is holding him on the charge which he got arrested for, will only release him once the violation is lifted.