That really depends on the data, doesn’t it? Say they used oogle Maps to get to your place of business. Fruit of the poisonous tree? What if they broke the license terms on some proprietary navigation software?

It’s also relevant that ICE mostly deals in civil law, not criminal. While illegal entry is also a crime, deportation is a civil enforcement action. The fruit of the poisonous tree doctrine doesn’t quite apply. There might be something similar though, and I’d love someone more knowledgeable to chime in.