triggerhippy
/// capital punishment does not stop murder, etc. ///
Obviously it cannot possibly stop murder (or the other crimes you mentioned) completely, and it would be stupid to say it would.
/// the worst crimes and murders this country has ever known were commited whilst capital punishment was in force ///
I must disagree with this statement of yours, we never had so many child murders, rapes, almost nightly fatalities from stabbings and shootings etc that we have today.
Why such infamous crimes as 'Jack the Ripper' committed, or Dr Crippin, John George Haigh acid bath murders, Ruth Ellis, John Reginald Halliday Christie, or Neville Heath, all infamous murders and all committed while hanging was in force, but which would most likely not have hit the headlines today.
So those could not be the most horrific crimes that took place while hanging was in force, so I think my point is not 'debunked', as you so wrongfully pointed out.