PHILADELPHIA (AP) - Baltimore, Philadelphia and other cities in a bloodstained corridor along the East Coast are seeing a surge in killings, and one of the most provocative explanations offered by criminal-justice experts is this: not enough new immigrants.
The theory holds that waves of hardworking, ambitious immigrants reinvigorate desperately poor black and Hispanic neighbourhoods and help keep crime down.
It is a theory that runs counter to the widely held notion that immigrants are a source of crime and disorder.
"New York, Los Angeles, they're seeing massive immigration - the transformation, really, of their cities from populations around the world," said Harvard sociologist Robert J. Sampson. "These are people selecting to go into a country to get ahead, so they're likely to be working hard and stay out of trouble."