It's nothing much. Just intentionally leaving a trail of breadcrumbs in case something like this happened again. Pictures, notes, things like that.

Or, to be concise. 'Data.'

[A part of him hated using that word in terms of this. That same part hated the idea of treating this rationally, but the suspicion needed a proper test.]

We wouldn't have an answer for a long while, and it really depends on what happens in the future.

...It also depends on trusting our own intelligence and ability to find the trail. That's the hard part.