A letter went home to parents on Wednesday informing them of the investigation.
The Delaware County Police Union says Raheem Blanden is on leave from his job as a Chester police officer and is under investigation for alleged misconduct on the force.
Christopher Ortiz has been suspended without pay since March of last year when the investigation began.
The indictment was filed on April 16 against 68-year-old Byron, who resigned from office in September 2023.
It comes after the board of trustee's launched a review in December following allegations of misconduct around papers he had authored or co-authored.
The investigative unit is tasked to independently look into things like officer misconduct, police involved shootings and citizen complaints against members of the Philadelphia Police Department.