The two investigators were "relieved of their police powers and suspended pending the outcome" of an internal investigation.
"A preliminary review of the facts has determine that there were violations of office policies that govern the transport of prisoners," reads the statement.
The men, aged 59 and 60, were driving Maday to a court appearance when he overpowered one of them, taking his gun and forcing the car off the road. That escape started a manhunt that lasted over 24 hours and resulted in Maday's arrest.
The other investigator is a 59-year-old former supervisor who had been demoted to investigator.
Both investigators were in the front seat of the car. Protocol requires at least one person to be seated in the back with the prisoner.
Alvarez's statement says that investigators transport an average of 300 prisoners each year without incident.