From wikipedia...
Injustice refers to either the absence, or the opposite, of justice.[1] The term may be applied either in reference to a particular event or situation, or to a larger status quo. The term generally refers to misuse, abuse, neglect, or malfeasance that is uncorrected or else sanctioned by a legal system. Misuse and abuse with regard to a particular case or context may represents a systemic failure to serve the cause of justice (cf. legal vacuum). Injustice means "gross unfairness." Injustice may be classified as a different system in comparison to different countries concept of justice and injustice. It may be simply the result of the flawed human decision making[2] that the system is supposed to protect against.
According to Plato, he doesn't know what justice is but he knows what justice is not.
The Innocence Project provides a wealth of tragic cases in which the U.S. justice system prosecuted and convicted the wrong person.
What do y'all think about it? It makes me angry.