Stranger (2017) on Netflix, but I understand it also streams on Peacock.
Season 1, episodes 1 through 4, out of 32 (16 episodes per season, two seasons)
It is about a prosecutor, Hwang Shi-mok (Cho Seung-woo) that shows no emotions. It isn't autism. It is related to a surgery he had for an auditory problem. It hasn't been explained in detail yet. He visualizes problems, is methodical, and thinks things through before coming to a conclusion. Regardless, he is not always correct. That is how the story starts. There is a murder. He finds the person that was last known to be at the scene (a tv repairman), and he has him arrested. Others think he is rude and arrogant. He is only half of the equation. The other half is a detective, Han Yeo-jin (Bae Doo-na). The show has not focused on her has much, but she is very smart, and doodles/draws a lot. She possibly the only person he trusts.
This story starts with a murder and slowly points to multiple people has the killer or involved in the killing. The murder seems to be leading to something very big, politically. We are spoon feed clues, so nearly everyone seems involved.
Murder, mystery, thriller.