
So, basically, Tada has been played like a kitten with a feather teaser by Usobuki from... the beginning? And the girl didn't look like she went painlessly (lying bastard) lol

Tada is a dumbass. Anyone who even thinks about rescuing a serial rapist-torturer-killer who just tried to set him up for torture-killing is one giant idiot.
Usobuki is amoral. (Though he generally has brought to ruin people who have done evil.) Yeah, he lied. He should not have killed the girl, since the Chief got his. (Unless the girl did some things we aren't aware of.) Of course, part of me wonders if the father or someone hired Usobuki to kill the girl, so he had another client besides the Chief.

As a human being and a cop, when you have someone who has just tried to kill you and has admitted he enjoys torturing, killing and was the one who kidnapped the girl (with the ultimate intent to murder her), he had no responsibility to help the guy. He shouldn't PUSH him out the window, but when a scumbag like that who has confessed to teh worst of crimes walks out a window--you let him. That's justice. I'd call this self-defense. If he'd pulled him up, the murderer would have overpowered and killed him. It would have been 1. foolhardy (aka stupid) and 2. a perversion of the cosmic justice about to occur.
wait... i was looking at the last page -works translators/scanlators are working on, do you know where i can find "King's Maker"? looks kinda interesting
Same place -- lezhin.com! King's Maker is fantastic, absolutely worth every coin I've spent on it so far. I don't think the English is behind the original, and if so, not much. The updates are weekly and even though it's only 16 chapters in, shit is getting so good..
It's on lezhin which is the official publisher for alot of webtoons.
https://www.lezhin.com/en/comic/kingsmaker_en
The pages of "works translators/scanlators are working on" are actually Lezhin's advertisements they put at the bottom of the chapters