While thise may be considered slander per se because it accused you of a criminal offense.
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It appears that they mutually agreed you were doing something illegal (despite you not doing anything)
In order to establish damage to your mental health you would need a mental professional to testify.
It order to prove slander you would need to prove it actually affected you not your supposition.
If you believe you wish to pursue this matter, then you should consult directly with an attorney
Answered on Apr 24th, 2020 at 11:14 AM