Fran said that he is unsure what the solution is and that the future looks bleak for Depor.
"No doubt, this is the worst period in the club's history," Marca quotes Fran as saying.
"We will see what the future holds, but things look really bleak. I do not know the solution.
"I think there must be an internal investigation to look at what does not work and the changes that need to be made."
Fran made 550 league appearances for the club between 1988 and 2005.