Your theory is just damn racist. You make a huge jump from correlation to causation that isn't warranted from the data you present -- it's that (I stress, obnoxiously unsubstantiated) jump that's damn racist.
Ex: "Melanin is positively correlated with crime. <Insert some unsubstantiated purely conjectural causal explanation about how melanin effects the psyche>" is exactly the same argument, and is (I hope obviously) damn racist.
The study cited also doesn't say what you think it does, and your misreading is obnoxiously wilful, to the point that it's clear you're looking for evidence to back something you believe a priori. But someone else has already taken that on.
Anyway, the bar for these sorts of claims is high for a reason: people have made these "black men just have medical differences that make them more susceptible to violence/rape/murder/crime" arguments since the existence of modern medicine. The evidence behind these claims has always been pure bullshit racism masquerading as science.
First, Even if testosterone plays a role in male incarceration rates, your conjecture that a 15% increase in average testosterone can explain the severe racial disparity in incarceration rates in unsubstantiated. Even if "X causes Y", it does not follow that "15% more X causes xx% more Y".
Second, there are tons of alternative explanations (e.g. socialization). Nature vs. nurture is adolescent-level stuff, and obviously males and females are socialized differently. Stop being thick.
Third, that's not how science (or anything except religion) works. You don't get to make fallaciously substantiated conjectures and then demand everyone believe them until the core claim is disproven.
edit: Oh wow, based on prior coments you're actually just straight up early 20th century style racist, or a troll, or both. Done engaging you, and really hoping you're just a stupid troll and don't believe anything you're saying here.
Ex: "Melanin is positively correlated with crime. <Insert some unsubstantiated purely conjectural causal explanation about how melanin effects the psyche>" is exactly the same argument, and is (I hope obviously) damn racist.
The study cited also doesn't say what you think it does, and your misreading is obnoxiously wilful, to the point that it's clear you're looking for evidence to back something you believe a priori. But someone else has already taken that on.
Anyway, the bar for these sorts of claims is high for a reason: people have made these "black men just have medical differences that make them more susceptible to violence/rape/murder/crime" arguments since the existence of modern medicine. The evidence behind these claims has always been pure bullshit racism masquerading as science.