[defense force filter]
Reid wrote up a report on it before he couldn't stay awake any longer-- The papers are in the HQ still, on the desk.
There are symbols in it that no one's been able to identify, which I know some people were considering our primary angle: identify the script, identify the perpetrator. Someone else added a few notes that Reid also had a few ideas about the type of person we'd be looking for who might do something like this, but those ideas were based on the assumption that it was being done deliberately, which someone has suggested might not be the case.
The circle only appears for a few hours at night, and it's very large, much larger than Reid could survey from a single point. It may center around the shelter, which might mean that we should consider people who live in the shelter our primary suspects.