The well-known activist had organized mobilizations demanding the safe return of the 43 forcibly disappeared Ayotzinapa students.

Alejandro Gustavo Salgado, an activist with the Popular Revolutionary Front (FPR), was found dead Wednesday only hours after being reported missing.

The president of the FPR has declared his death a “political crime.” The FPR is the grassroots wing of the Communist Party of Mexico (Marxist-Leninist).