Did you notice--Feldman hasn't denied the plea dealings in the works. Dusek cannot therefore confirm them as it would be unethical. You may argue that Dusek wishes to be coy about the story to keep it alive, however, if the story were untrue there is nothing to stop Feldman and the other attorneys from setting the record straight.
And as your transcript excerpts show, Dusek is correct. Feldman never said his client was innocent. He argued that DW couldn't have dumped the body (charming) and urged the jury that there were doubts.