I think if voice identification is being used as grounds to warrant a player and perform an investigation on that alone then it will reduce the server to simply I don't interact with cops or talk to them ever because then that will be used against me, and even though I want to have fun, if I use my voice it will jeopordize my future and my liberty so I will just drive away as fast as possible and avoid every cop interaction ever.
The interaction between a wanted player (while masked) and a cop should go like this in my opinion:
Cop: You sound a lot like John
John: No that's not me
Cop: Ok
If police pursue a suspect or witness them committing a crime and they are unable to catch them during the pursuit then they should be free to walk away with the risk of being identified later down the line if you are again somehow linked to the crime, typically by wearing the same outfit or through DNA evidence, which would be acquirable by police catching you commiting a crime again under the same APB so same vehicle/clothing/face identification.
While you might not mean it the way you used it, Warrants (shouldn't) be applied on voice alone already. That requires more statements and I believe the chief's are vigilant for it especially after your case w/ Silver Sun.
Let's assume the following case:
An officer is performing a traffic stop, the suspect did speak momentarily with a voice the officer could (later) recognise before speeding off and disappearing.
Later the officer is sitting in burgershot, when a man with different clothing/mask comes in and speaks in a voice the officer recognises from the aforementioned situation. The Officer can go up and ask/attempt to get an identity on the individual that matches the APB. Let's assume that the officer gets the identity either through voluntary ID or through arrest for Obstruction of Justice and the following process.
Congratulations, the officer now has an individual with the same voice as the one that got away from him. What do you mean can I prove it was him driving the car and not just someone with a similar voice? (Suspect is later found innocent as there was not enough evidence to prove he was driving)
Now, if you have committed a crime where enough evidence was brought against you to identify it as you who did it but you haven't been caught yet. You'll be under a warrant, which means the threat of officers identifying you is significantly raised.
Then this becomes a problem for you as should be natural.
Now with all the chaos that has happened in the days since warrants functioned, we've only had 4 maybe 5. Which collectively was for like maybe 2 or 3 people because not all crimes get warrants and even fewer crimes where the suspect got away to have enough evidence to prove it was the suspect which means that it won't be warranted.