1) "In Hong Kong, a betrayed wife is legally allowed to kill her adulterous husband, but may only do so with her bare hands. The husband's lover may be killed in any manner desired." Source: http://www.unsolvedmysteries.com/usm225642.html "In Hong Kong a woman can kill her husband if he cheats on her, but only with her bare hands. And she can kill his mistress whatever way takes her fancy." Source: http://www.revleft.com/index.php?showtopic=13279 "Lucy blathers on about how a betrayed wife can murder her husband with her bare hands legally in Hong Kong. Apparently, this passes for idle chit-chat. Funny -- at my office, we talk about movies. Ah, bad television writers who have no outlet for their trivia. We are all at your mercy." Source: http://www.televisionwithoutpity.com/portal/site/TelevisionWithoutPity/menuitem.766266d5c663f366b180b41045001d30/?vgnextoid=541b50e49e2a2110VgnVCM1000006dc1d240RCRD&currentPage=10&ShowName=The+Practice "In Hong Kong, a betrayed wife is legally allowed to kill her adulterous husband, but may only do so with her bare hands. (The husband's lover, on the other hand, may be killed in any manner desired.)" Source (among other interesting "Bizarre Sex Laws"): http://gsth.blogspot.com/ 2) "After all, murder is legal in many circumstances (ie. war)." Source: http://www.japantoday.com/forum/fb.asp?m=950004 3) "we are exposed to toxins and poisons against our will all the time. they also kill you slowly like antifreeze and since slow murder is legal, why are we making such a big deal about the chinese toothpaste? you have a choice to buy chinese toothpaste or whatever." Source: http://www.urbantoronto.ca/archive/index.php/t-5936.html

Technically, never. Murder is a legal term (term of art) representing an illegal killing. If you legally kill someone, it is not murder. The same is true in America. There are instances when it is legal for you to kill another person, but these killings are not murder because they are legal.