Since 30 more years ago, indiscriminate killing/harming began to draw the attention of people in Taiwan. Especially, in recent one more decades, the media exposure of such events increased. It seemed that the incidence of such events is higher than in the past. In addition, people get very much frightened as the causes and the offenders' motivation are often unknown, especially when combined with the unpredictability of the offenders' psychopathology. Therefore, some scholars argued for strengthening the mechanisms of individual and social protection in which concerns for human rights protection is not the priority. This paper first proposes a definition of indiscriminative killing and explores the intricacies among mental health, criminal justice and human rights protection based on simple introduction of several cases of indiscriminate killing. Then, it used five conceptual models for governance of order in human society. After the literature review of theories and empirical studies on killing, especially stranger killing, the paper finally proposed a multilevel multi-professional dynamic policy model for the prevention of indiscriminative killing. It emphasizes that a good enough social welfare policy with good concerns for human rights may prevent the happening of indiscriminate killers or indiscriminate killings. Due to the rarity of such events, the reduction of the potential incidence of indiscriminate killing could be deemed as a collateral benefit of social welfare policy, but we would not know who or which events benefit from these good enough policy measures.