There is now convincing empirical evidence that exposure to suicide increases the risk of subsequent suicide, as well as other negative mental health sequelae, in those who have been exposed. This article provides a review of this empirical evidence. It also concludes that this substantial evidence base makes the compelling case that all suicide prevention programs need to include postvention services as a direct form of suicide prevention with a population of people known to be at heightened risk for suicide themselves: suicide loss survivors.