In 2010, the government's equality watchdog released a report on the use of stop and search powers in 42 policing areas over five years.
The report concluded that "racial stereotyping and discrimination are significant factors" in the varying rates at which people are stopped and searched.
- Black people six times more likely to be stopped and searched than white people
- Asian people twice as likely to be stopped and searched than white people
- Some of the highest racially disproportionate rates were seen in the West Midlands, Thames Valley, West Mercia and South Yorkshire
A follow-up trial with five police forces found that they were able to reduce their use of stop and search power by up to 50 percent while continuing to see a reduction in crime rates.
The Home Secretary has unveiled a review of controversial stop-and-search powers of police.
A teenager who claims to have been stopped and searched "more than 20 times" has told ITV News he welcomes the government's review.