It depends on the information being requested, and the information must be directly related to the information we've already collected.
As I mentioned, we're usually at the very beginning of the investigation and we have only one person's statement saying that a certain incident occurred. We have to build a case before presenting it to the judge.
We can't just say we believe it's true, simply “because”. We have to start conducting verifications. For example, we have to state that we've confirmed that Mr. So-And-So is a customer of a certain provider. We can then state that a certain individual is associated with a certain account. We then have reasonable grounds to suspect that this person may be involved in the investigation.