Gomez is accused of “probable participation” in the torture and enforced disappearance of some people interviewed in connection with the investigation. The United Nations human rights office has also accused authorities of torturing dozens of people linked to the investigation.
He previously denied the torture allegations, Reuters reported. He resigned late last year after being identified in a video that appeared to show officials torturing a suspect.
“We hope he can also say where the children are and who else was involved in their disappearance,” said Felipe De La Cruz, the father of one of the missing student teachers, Reuters reported.
Investigators found a bone fragment from one of the student teachers in July. Before the discovery, the remains of only one of the student teachers had been identified by officials, according to the outlet.