Volz is probably best known for his two attempts to prosecute former Governor Edwin Edwards.
He brought Edwards to court twice on racketeering charges.
One trial ended in a hung jury the other, in an acquittal.
Edwards, of course, eventually was convicted for similar crimes and recently was released to a half-way house.
Volz also convicted New Orleans crime boss Carlos Marcello, and, as a young prosecutor working in the Orleans DA's office, he worked on Jim Garrison's investigation of Clay Shaw and Lee Harvey Oswald after the assassination of President John F. Kennedy.