Flagitious is a fancy and forceful word for "wicked and nasty." As sheriff, it's up to you to bring the flagitious outlaws to justice.
Remember that flagitious has three syllables and the "t" is pronounced like "sh" (similar to "ambitious"). Use flagitious when you want to emphasize the extremely brutal nature of a crime or other bad action. The crime scene photos showed the results of actions so flagitious you could not bear to look at them.