I can respond to your general question on whether the taser is necessary. If you look at the history of policing, police through their history, starting with Bobby Peel in the 1820s, clearly used different tools. They didn't always start out with weapons. They started out with batons and things like this. There has been evolution of what they used or didn't use over a period of time. Until about 2001--certainly it was December 2001 for the RCMP--they didn't use the taser in Canada; they used other techniques.
That doesn't mean you should stick to the status quo. You evolve. It is there. It is a tool. The issue is whether it is an appropriate tool.
You talked about the United Kingdom. I believe the Royal Ulster Constabulary for a long time didn't have....
That's a Canadian example--