Records show feds’ investigation of Ald. Burke broader than previously known

The Chicago Sun-Times reports:

In an unusual move, agents refer in the attachment to eight people only by letters of the alphabet, along with 14 “entities,” also identified only by letters. The federal agents searching Burke’s City Hall offices knew, of course, what entities or individuals the different letters stood for but wanted to keep them secret from Burke and his associates.

Imagine that.