In 2008 , only one crime was solved for every 1,000 cameras , according to the city 's police . New technology makes it easier to identify suspects in surveillance photos and video . The Boston bombing suspects were identified on security - camera footage . Cities such as New York and London now have thousands of suspects on the streets . Facial - recognition software can detect age , sex and even moods .
New technology makes it easier to identify suspects in surveillance photos and video . The Boston bombing suspects were identified on security - camera footage . Cities such as New York and London now have thousands of suspects on the streets . Facial - recognition software can detect age , sex and even moods .