Fernandez was originally indicted June 20, 1988 on four counts of obstruction and false statements.
Four other officers and Officer Paparella were originally indicted on murder charges in the case.
Officials said the new suspect is not one of the six men originally indicted in the bombing of the World Trade Center.
Mr. Minkow was originally indicted with 12 others, 10 of whom have since pleaded guilty to various charges stemming from the alleged fraud.
Mr. Helmsley, 83 years old, was originally indicted on the same charges as his wife was, but he was found incompetent to stand trial.
The players were originally indicted on charges of rape, sexual offense and kidnapping, but the rape charge was dropped in December.
Seven defendants were originally indicted last year.
The trial began last September, but most of those originally indicted have either pleaded guilty or are awaiting separate trials.
He was originally indicted on March 16, 1988 on six counts.
Twenty-one people were originally indicted in the case.