Amnesty International, Rio Olympics 'marred by gun violence'
Brazil has one of the world’s highest homicide rates with around 42,000 gun-related deaths every year.
A Brazilian military police soldier patrols at the security fence outside the 2016 Rio Olympics Park in Rio de Janeiro, Brazil, July 21, 2016(photo credit: REUTERS)ByELIYAHU KAMISHERUpdated: