I am so sad for PC Harper's wife and family. Those killers are utter scum.
I think the main problem is the definition of 'murder' in English law. There is no statutory definition of 'murder' but the common law definition as explained on the Crown Prosecution Service website is:
"the crime of murder is committed, where a person:
-Of sound mind and discretion (i.e. sane);
-unlawfully kills (i.e. not self-defence or other justified killing);
-any reasonable creature (human being);
-in being (born alive and breathing through its own lungs);
-under the Queen's Peace (not in war-time);
-with intent to kill or cause grievous bodily harm."
It would be MUCH better to have a definition such as New Zealand's, which includes causing an injury that is LIKELY to lead to death and NOT CARING whether or not death ensues - s167(b) below:
"Murder, manslaughter, etc
167 Murder defined
Culpable homicide is murder in each of the following cases:
(a) if the offender means to cause the death of the person killed:
(b) if the offender means to cause to the person killed any bodily injury that is known to the offender to be likely to cause death, and is reckless whether death ensues or not:
(c) if the offender means to cause death, or, being so reckless as aforesaid, means to cause such bodily injury as aforesaid to one person, and by accident or mistake kills another person, though he or she does not mean to hurt the person killed:
(d) if the offender for any unlawful object does an act that he or she knows to be likely to cause death, and thereby kills any person, though he or she may have desired that his or her object should be effected without hurting any one."