It&#x27;s called spoilation of evidence:<p>&gt; The spoliation of evidence is the intentional, reckless, or negligent withholding, hiding, altering, fabricating, or destroying of evidence relevant to a legal proceeding.<p><a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Spoliation_of_evidence" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Spoliation_of_evidence</a><p>And an illegitimate evidence chain is called &quot;fruit of the poisonous tree.&quot;<p><a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Fruit_of_the_poisonous_tree" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Fruit_of_the_poisonous_tree</a><p>That said, the proof of a &quot;poisonous tree&quot; is itself difficult&#x2F;impossible to obtain through legal means. Generally the message they send to anyone attempting to reveal the illicit nature of the evidence is told &quot;even if you try, your proof will guaranteed to be inadmissible.&quot;