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You can sue for malicious prosecution and negligent investigation against the university employee who allegedly conducted this investigation and lied claiming there was an admission and a taped confession. The university as employer of this person can be held liable for the actions of their employee working in the scope of their employment. You can sue for all of the costs incurred as well as the damage to your son's reputation for being falsely accused of theft and the employee lying about having a taped confession, especially when the text messages your son had proved completely the opposite.
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