The protest at 12.00 pm local time (10:00 GMT) will be attended by family, friends and colleagues of Jose Couso. The victim's brother stressed that Jose Couso’s family will fight for justice until the end.
According to him, Spanish judge Santiago Pedraz turned last summer to the Genocide Network, an institution under the European Council, asking for their assistance in light of the US refusal to cooperate.
"They [US officials] are very upset that this case is still open, which pleases us greatly."
The US invasion of Iraq in 2003 aimed to eliminate weapons of mass destruction believed to have been held by the late Iraqi leader Saddam Hussein. The war claimed the lives of more than 100,000 civilians between 2003 and 2011, according to the Iraq Body Count database. The weapons were never found.