It's the DRM argument - publishers don't stop using Denuvo because someone always manages to crack it, they use it to stop little Timmy from copying Assassins Creed 27 on to a USB drive for his friend Dave. In the same way, Officer Porkchop can't openly conspire with Lieutenant Bacon to plant evidence, because the audio is on record. But doubtlessly, the Porcine Patrollers will manage when it really counts, maybe just not as often.