I never said that but then such a service will only help criminals to get their tainted Bitcoins or BTC gained through criminal activities shuffled by them and have them saved. I bet they currently have the choice of helping out in such cases as they have got all the details in the end like transaction timestamps, id's and everything as well as the transactions that they sent? No?
Exactly what Adolfin said above. Also, WHO decides who are criminals? The government? So, basically you want ChipMixer and any other mixer to be a honeypot for the gov? If they say someone is a criminal, they should just save and handle them everything about the user, otherwise they get shutdown? Why the heck would anyone even use a mixer if they basically work for the gov?
And no. They don't have all the details because they don't save their costumers data. That's the entire point of a mixer.