Special Criminal Investigation Team

[No system + no cheats + hard-core reasoning + single female protagonist + king of soldiers + decisive killing] The king of special operations soldiers was surrounded by the enemy while performing a special mission. His teammates and he were brutally killed. He managed to survive. From then on, his only belief was to pursue the murderer and take revenge, but he didn't even know who his enemy was. As a retired criminal police officer, one difficult case after another comes one after another: A pair of mothers and daughters were tortured and killed one after another, and the murderer was horribly perverted. The tenants of the haunted house died one after another. It turns out that people are scarier than ghosts. Seven years ago, five girls were kidnapped by the Ghost King. Was it the ghost who committed the crime? ... The murderer reveals himself, and the enemy gradually emerges. The King of Soldiers faced these extremely vicious people without flinching or fearing, only hard steel to the end!