If you can't proof they did it on purpose with the evidence to back it up, you have no case.
Besides that, no judge will convict a company that "accidently" broke illegal cloned devices from a company that breached their IP in the first place,
AND the company that made the clones will not file a lawsuit in the first place because they were wrong to start with and don't care about their "customers" they sold their crap to.