Human Rights Watch expressed concern that no supporters of Ivorian President Alassane Ouattara have faced justice despite his stated commitment to impartial justice.
"President Ouattara's expressed support for impartial justice rings hollow without more concrete action to bring justice for victims of crimes committed by pro-government forces," Human Rights Watch justice adviser Param-Preet Singh said in a statement.
Ouattara won a 2010 election meant to unite a country divided by civil conflict. Incumbent President Laurent Gbagbo challenged the claims, pushing Ivory Coast to the brink of war.
Human Rights Watch said at least 3,000 people were killed in post-election violence. Gbagbo is on trail at the International Criminal Court for crimes allegedly committed in Ivory Coast.
Rights groups suspect both sides played a role in the violence.
"If Ivory Coast is going to break from its dangerous legacy in which people close to the government are beyond the reach of the law, it needs credible prosecutions of those responsible for crimes on both sides of the post-election conflict," Singh said.