In the mountains of Petatlan, the state of Guerrero, Mexico, the sicarios from the Los Viagras cartel executed a community policeman. Los Viagras, albeit not that big a cartel, are active in the Mexican states of Guerrero and Michoacán, and reportedly kill comunity policemen as the means to maintain the control over the areas.
In the low quality video released, the sicarios are shown shooting a captured man with a rifle and a hand gun. The execution takes place in a remote forested area.
Props to Best Gore member @ramiroromo for the video: