Another major arrest has been made in the infamous case of 43 students who were disappeared in southern Mexico.

Gen. Jose Rodriguez has been taken into custody for his suspected role in the Ayotzinapa case. He is one of three military members recently arrested in connection with the crimes, according to deputy security secretary Ricardo Mejia.

Then a colonel, Rodriguez was the commander of the army battalion in Iguala, Guerrero, when several people were killed and the Ayotzinapa teacher’s college students were disappeared in September 2014.

Last month, human rights undersecretary Alejandro Encinas called the Ayotzinapa tragedy a “crime of state.” He later accused Rodriguez of having personally ordered the execution of six students, who may have still been alive up to four days after the long, bloody night of the mass disappearance.