Agreed. If crime is correlated with child poverty, and cheap rentals are old houses which haven't been renovated in a long time, and tend to have more lead pai

Agreed. If crime is correlated with child poverty, and cheap rentals are old houses which haven't been renovated in a long time, and tend to have more lead paint. Then on average criminals will have higher blood lead levels. This doesn't provide any evidence that lead had any causal affect in crime.