Keno Bates, Liar
Keno Bates, Sleazeball, runs a saloon. As every Hart movie has shown, saloon owners are despicable scumbags who run crooked gambling halls. When one of Keno's victims refuses to accept that he'd walked into Keno's trap, he lashes out in armed revenge to retrieve his money - just as the “hero” of Hart's The Silent Man (1917) does. Although both Keno and his henchman were armed, they offered no resistance (which would be considered legitimate self-defense), made no attempt to dissuade the man, and afterwards never notified the law.
Instead Keno Bates, Lyncher and his henchman set out after the money they'd swindled, and the hombre who had the gall to grab it back - despite knowing he was armed and desperate.
When Keno Bates, Murderer eyeballs a snapshot of his victim's sister, he warns his henchman to get ready to take their lying to a whole new level, as Keno Bates, Slimebucket starts scheming how to use the murder he just committed to bust a move on the dead man's sister.
Later, when the sister learns that she has been deceived, she reacts like her brother. First, she lashes out murderously against the innocent messenger - the only honest person in the whole flick, and the one who legitimately pulled a weapon in self-defense.
Then she lashes out in armed revenge against Keno Bates, Sucker, who has fallen for a wild vixen in sheep's clothing, who will bring into his life the hell that he rightly deserves, and the DNA that would eventually result in Norman Bates, Psycho.