The Serial Killer Is Reincarnated Into the Another World. is a Manga/Manhwa/Manhua in english language, THRILLER series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.nl fastest updating comic site. The Summary is

A murderer who cannot stop the urge to kill people, even though he wants to stop, receives the death sentence he wants. His joy is short-lived, as he is reincarnated in another world. The mission entrusted to him by the goddess is to kill 12 reincarnated people using his murderous impulses. Not all reincarnated people are saints!