Tom -- one thing I was curious about...what prompted you to share this now vs. after doing more digging to see if there's anything beyond the charges/bills. Any communication between Horton and the District acknowledging the charges, providing any kind of explanation for these "erroneous" expenses?
I think a potential pitfall here is relying on assumptions over proof, and it runs the risk of undermining the credibility of this blog (even if that's unfair) and the findings therein. Short of uncovering some kind of mea culpa evidence surrounding the repayment of the $12k, this is becoming something that many in the comment section here (and now elsewhere, like on FB) are just running with based on their own interpretations of limited info. Will be interesting to see if your additional FOIA requests produce anything further. If not, this may end up amounting to nothing more than a nothing-burger since more transparency measures have been added around the P-card.