Can you call and ask which detention center this person is going to?

Yes, but people are not obliged to tell you. Because this belongs to the personal privacy of the injured, if you don't agree to tell your family before the injury, the police won't say it. If the injury agrees, the police will tell it. If the family has never said anything, the police will not acquiesce.

But it's no use knowing, because you can't visit the detention center.