Of the 19 co-defendants, 4 have made plea deals with prosecutors so far. The rest have plead not guilty. How many will enter a guilty plea for at least one of the charges brought against them?

I'll use these Wikipedia pages or their successors as resolution sources unless there is evidence of problems with them, in which case I will rely on primary court documents and/or credible reporting. Close date will be extended as required, until the trial and sentencing are complete or all parties have entered guilty pleas.