[cblades]

Given that the police wanted information after having already received the threats, they had to have requested some combination of historical and future data. They almost certainly wanted historical data primarily so that they could find the person who sent the threats.

There's no way to satisfy requests for historical data without capturing data from everyone.

[lern_too_spel]

> There's no way to satisfy requests for historical data without capturing data from everyone.

That's not what GGGP suggested. He suggested that they give data for specific people that they already have. You are setting up a strawman here.

[cblades]

> He suggested that they give data for specific people that they already have.

...how were they to know to capture data from those specific people before being asked?

[lern_too_spel]

They don't need to. They only need to turn over data they already have for that user and potentially any future data that is generated for that user. Wiretaps work the same way.