The judge has ordered them to keep deliberating.
Spacey still faces a criminal charge.
Officials said they would continue their investigation and wage a “vigorous pursuit of justice," some five years after the water crisis first began.
With Paul Manafort and Michael Cohen convicted of multiple criminal charges, the investigations circled ever closer to Trump.
The latest indictment includes allegations of wrongdoing as recently as January 2017.
The charges are part of the criminal case brought by Special Counsel Robert Mueller.