Assuming there's a house search, then may be taken along laptops that belong to the AG?

Assuming there's a house search, then may be taken along laptops that belong to the AG?

Yes. The police collect evidence. Who owns items that can serve as evidence, does not matter.

Yes, anything that helps to confirm or invalidate a suspicion

I really mean everything (diary, laundry, photos, appliances, …)

The seizure is based on § 94 of the Code of Criminal Procedure. Thereafter, all items must be taken into custody, which may be of importance as evidence for the investigation. It does not matter what kind of ownership the property is.