In Mexico, human rights groups and family members are demanding justice after the mayor of a town in the southern state of Oaxaca was gunned down on New Year’s Day, just hours after taking office. Alejandro Aparicio was surrounded by supporters and publicly touring city offices when he was shot on the street. The gunman was pinned to the ground until police could arrive to arrest him; he’s been described as a 34-year-old former police officer from northern Mexico. Aparicio’s widow, Victoria Feria, believes the killer did not act on his own.

Victoria Feria: “We want to do everything possible to clarify this murder, because there can be no impunity. That is what we are asking for as a family, to clarify the killing and to support us.”

Aparicio was a member of the progressive party of Mexican President Andrés Manuel López Obrador. His death came as human rights researchers said 175 Mexican politicians were killed over a 12-month period ending last August.