One month after the killing of journalist and social activist Adams Ledesma, director of a TV channel in a Buenos Aires shantytown, the crime remains unpunished, and neighbors and relatives have called a march to insist that the case is solved, Perfil newspaper reports.

Ledesma, a Bolivian citizen, was also a correspondent for the Mundo Villa newspaper and director of the cable TV channel by the same name. He was stabbed to death Sept. 4.

The Argentine Journalism Forum (FOPEA) urged authorities to “advance steadily in the investigation of the case,” and lamented the media’s lack of coverage of the case.