So that's what a 40% success rate? what would they do if these gangs actually had respect for them and didn't film each other committing violent crimes to put on Youtube? the guy could have had his neck broken and police were probably nowhere in the area because they're too busy policing Facebook and Twitter protecting overly sensitive people from being offended.
Total nonsense, try again when you've got some new material.
What would you prefer a situation like the US where the police are often barely trained in the proper use of their guns, and have little ongoing training, or one where every armed officer is effectively trained to the same (or better) level as State (if not federal) level SWAT teams?
In fairness, the alternative to our current model isn't a situation like the US though, they have their own problems that are fairly unique to them for a number of reasons. There are plenty of other countries (including Northern Ireland) from which we could draw inspiration and best practice.