Structures of Sin are what the Church means by organizations designed (whether wilfully or by negligence) to make it easy to sin and hard to be virtuous.
Things humans build do not do what you want them to do. They do what you design them to do. That is why percussive maintenance is stupid. Computers aren’t out to get you. They just do what they were designed to do and if they were not designed to do the thing you want they will not do that thing no matter how often you pound on them.
Same with organizations. If you design them to hinder virtue and reward evil, they will go on doing that, no matter how many nice people you put into them.
Case in point, training cops using the services of this deadly and toxic weirdo is going to create a police department filled with deadly, toxic weirdos:
Not only does he urge cops to be swift to kill, but he urges them to see murder as one hell of an aphrodisiac:
When you let depraved weirdos train your cops, you get whole departments full of depraved weirdos.
To recap: Predators go where prey is. Sadists and death fetishists with a hunger for violence will naturally gravitate to professions where violence is permitted and if you train them that it’s okay, they will indulge themselves and protect one another as they do. Such professions therefore need the opposite of this depraved weirdo training them.
They need to screen out the sadists and killers right from the start and, the instant they manifest, they need to be kicked out and prosecuted. Derek Chauvin should not have required the combined force of a global outcry to be punished. A system that requires such force to dynamite a killer out of his job and into prison is precisely what is meant by a Structure of Sin.
And if the killer is treated like One Bad Apple but the Structure of Sin lovingly preserved and protected, you will just get more murder and sadism.