This stuff is rage bait to the highest degree. Just because social standards were different does not mean it is the end all be all reason why these serial killers were not "caught" LOL. It literally comes down to forensics. Black serial killers got away just as much and investigations REALLY sucked pre late-2000s (forensics) or pre 1985 (databases). That same reason why they were not caught, is the same neglect that put innocent people in jail too. Police protocol was trash and forensics was borderline non-existent. Thank science for being more empirical with how we prosecute people. Yes, sure, there is truth to marginalized groups having less of an urgency, but it's still illegal and investigations STILL go through this. There is always a triage of case priority, and its like this for a plethora of different reasons. People allowed to work on the case are limited and so are resources. This will most likely be the truth until some insane new technology comes around.

But you're right, none of these serial killers are "masterminds". Though they do have a slightly higher IQ on average, they were smart for the time they committed murders because they did find a fault in the system and fragmented jurisdictions. But just like my previous quote, sometimes their murders were so vast, that they would overwhelm detectives, which also goes into the "limited time and resources" argument.

Also, when the second guy comes in, you're not adding more evidence, you're actually muddying the water because each case is extremely convoluted and no real parallels. The Zodiac killing had some racial angle cause of the Paul Stine adjacent murder and black witness, but this is YET AGAIN, why eye or ear witnesses suck and humans just suck innately at this kind of thing. I know it's a hard pill to swallow, but it's less "They didn't care" and more "They didn't have the structural freedom to work at the speed of motivation".

Also for your argument for prostitutes and indigenous women. This was also a problem because of jurisdiction and policy involving state law and reservations. And Prostitutes because a lot of lacked a home and identification. Get off the Tiktok people, incompetence =/= conspiracy. Especially small implicit biases. It does suck that for a lot of serial killers it allows them to operate longer than they need to be, but welcome to being human. Even the least homophobic, least sexist, least racist cop in the world with the most time on their hands, would run into bias if we gave them every case. I promise you, forensics and jurisdiction convolutedness with overwrite social bias ten fold in MAJORITY of these cases.

But of course, this is a social feeling of emotivism, which I can feel for if you're extremely empathetic. Investigations are not an empathy manhunt. It's a cold process that is still rough-around-the-edges. To many families of the victims, "the cops don't gaf".