If I'd been smart enough to think of this last night, which I wasn't, I might have known some of that because I just looked up one of the available photos of Kelly (one of the ones that I mentioned aren't suitable for this scene for reasons that will become obvious down the road) and in it she's wearing a Hallowell t-shirt. Well, all you can see is "Hallowe" - but given your info, it's obviously a Hallowell t-shirt.
And thanks for the info because quite obviously I'd forgotten. Though it is almost a disappointment that she isn't wearing a Miskatonic U. belly shirt.
[spoiler]but the last name given by the Sheriff after he identified her body from her student ID differed from what's listed in all the production material (Greer).[/spoiler]
So in other words she's the Todd Jennings/Blake of the '04 pilot!!