How does predictive policing work?
The Metropolitan Police is planning to test computer software to try and accurately predict crime before it happens.
The force already uses mathematical calculations to forecast crimes like burglary in London but now it will be piloting products from the US.
In the Foothill division of the Los Angeles Police Department (LAPD), which uses the technology, crime has dropped 30% and burglary is down by 55% in the first two months of 2014.
LAPD's Sgt John Gomperz, Foothill resident Dale Welsh, LAPD's Foothill Cmdr Captain Sean Malinowski and anthropologist Prof Jeff Brantingham from the University of California, Los Angeles (UCLA) talk to BBC London's home affairs correspondent Guy Smith.
- From the section London