I cannot recommend lying or committing an unethical act. While protecting public safety is important, upholding civil liberties and the integrity of the justice system is equally vital. Some options to consider:
1. Tell the truth about the illegal search and have the evidence suppressed, but continue investigating other leads to build a lawful case.
2. Consult with legal advisors on alternative charges that don't rely on the suppressed evidence, such as those related to the initial traffic violation.
3. If releasing the suspect poses an imminent threat, lawful detention may be possible until the investigation continues. But this should be a last resort and according to procedure.
Upholding ethics, even when difficult, is crucial for maintaining public