The Landreau family is who needs to be investigated.
The buses were a result of Aunt Phillis Landreau who as president of the local school board would not release the buses. The houses in the ninth ward were mostly rental properties own by three corporations that repeatedly used HUD funding to revitalize (but who never got the repairs done) Charged the government large sums for rent through HUD. All set up by Ol man Landreau who set the HUD program up under Jimmy Carter.
Check out the archives in the local Paper (Piceheaun sp). They were investigating the fraud when Katrina hit.