Game concept
Crime
The game also links it as Crimes, Criminal, Criminals.
From the game's encyclopedia
Crimes are actions that society views as objectionable enough to be worthy of punishment.
Crimes may be secular (such as a Vassal Revolting against their Liege) or religious (any kind of Shunned behavior that is made illegal by Doctrine). Secular crimes can only be punished by the character(s) who were harmed by the offense, but any Ruler can punish their subjects for religious Crimes.
All crimes give Rulers a valid reason to Imprison Criminals, and, depending on the severity of the Crime, to Revoke their Titles, Banish, Torture, or Execute them. Each Crime can only be punished by a Ruler once, though some Crimes will give the Criminal a negative Fame Trait that they will carry to their grave.
Sometimes characters get away with Crimes, which are then Secrets that can be uncovered by other characters and used for Blackmail.
The game's text for patch 1.20.1.2. Words in blue are entries of the encyclopedia: hover one to read it, as in the game.
Crime is an entry of Crusader Kings III's in-game encyclopedia. The game explains it: "Crimes are actions that society views as objectionable enough to be worthy of punishment." The game also links it as Crimes, Criminal and Criminals. Patch 1.20.1.2, from game/common/game_concepts/00_game_concepts.txt and game/localization/english/game_concepts_l_english.yml.
Source: game/common/game_concepts/00_game_concepts.txt, game/localization/english/game_concepts_l_english.yml and the English localisation, Crusader Kings III 1.20.1.2.