A security guard tries to close his shop gate as masked protesters walk by, as clashes break out at the end of a march commemorating the eighth year anniversary of the police killing of Mapuche indigenous activist Matias Catrileo in Santiago, Chile, Tuesday, Jan. 5, 2016. Catrileo was shot to death on Jan. 3, 2008 by a police officer during a land dispute in southern Chile. The officer was sentenced to three years in jail, but served his time on probation, and was eventually removed from the police force. (AP Photo/Luis Hidalgo)