Probably coulda used an example that isn't itself a fourth amendment violation that essentially requires perjury to accomplish. Also less euphemistically called evidence laundering. Not really a neutral example.
A more charitable case is that the source cannot be disclosed because it's an undercover agent or informant. What the parent describes is indeed evidence laundering.
A more charitable case is that the source cannot be disclosed because it's an undercover agent or informant. What the parent describes is indeed evidence laundering.