The sheriff's office says Villarreal on July 10 found Charles Gabriel Johnson hanging by an electric cord. Johnson hours earlier was charged with aggravated assault with a deadly weapon, family violence.
The complaint says Paez, who was the watch commander, told Villarreal to fill out the log sheet up until the time Johnson was found dead.
Jail officials did not have information on attorneys for Paez and Villarreal. Prosecutors did not immediately return a message Friday.