Windowswerebroken in two houses in the loyalist Gunnell Hill area of Whitewell, in the north of the city, after bricks were hurled at the homes about 0400 BST on Saturday.
The concept was outlined in an earlier Ludwig paper: precincts targeted for brokenwindows policing were those that saw huge spikes in crime in the 1980s.
What's called stop-and-frisk - it has a lot of other names like community policing - or sort of focusing on, what is it - the brokenwindows policing as it were?