We want to avoid any bad surprises for taxpayers.

I think more than likely this is drug-related, ... We're still very early into the investigation and have a lot of people to talk to.

Moody's Investors Service recently upgraded the underlying rating from A3 to A2 on the District's outstanding debt - without the PSF guarantee. Factors contributing to the upgrade included healthy tax base growth, well-managed finances despite operating at the maximum allowed tax rate for maintenance and operations for several years, and manageable debt ratios.