Homicial ideation is a common medical term for thoughts about homicide. There is a range of homicidal thoughts which spans from vague ideas of revenge to detailed and fully formulated plans without the act itself. Many people who have homicidal ideation do not commit homicide. 50-91% of people surveyed on university grounds in various places in the USA admit to having had a homicidal fantasy. Homicidal ideation is common, accounting for 10-17% of patient presentations to psychiatric facilities in the USA.