What does word ''impunity'' means to you?  

Yes you are right, it is related to laws. Impunity means "exemption from punishment or loss or escape from fines". In the international law of human rights, it refers to the failure to bring perpetrators of human rights violations to justice and, as such, itself constitutes a denial of the victims' right to justice and redress. Impunity is especially common in countries that lack a tradition of the rule of law, suffer from corruption or that have entrenched systems of patronage, or where the judiciary is weak or members of the security forces are protected by special jurisdictions or immunities. I hope you understood now.