Lead exposure, crime seem to correlate - USATODAY.com
He found a "stunning" fit, he says. The trend lines match almost perfectly: Leaded-gas use climbed in the 1940s and fell in the early 1970s; 23 years later, rates for violent crime followed in near unison. He also studied lead-paint levels from 1879 over the next 60 years, matching them to murder rates from 1900 to 1959.
