加拿大能持枪吗？
2018.9.14 更新 最近看到几个新案例，和大家分享一下 Darryl Vance and Karl LaPan， two men with a history of violence against women who went on in April to gun down four people， including two young girls attending an Easter breakfast at a church in London， Ontario， were found not criminally responsible because they had been using methamphetamine extensively before the killings. It was noted that Mr.Vance’s use of drugs began when he was nine years old， but it has also been established that his “extensive” drug use did not begin until several weeks prior to the murders. The Crown appealed this decision arguing that both defendants should be held liable for their actions. A three-judge panel unanimously ruled last week that the trial judge should have allowed evidence about the defendants’ extensive drug use as relevant to whether or not there was a basis in fact to conclude the men were suffering from a mental disorder that rendered them incapable of appreciating the nature and quality of the act or that what they were doing was wrong at the time they committed the acts; the appeal court also agreed that while these offences are serious ones， neither man could possibly assist in identifying ways the criminal law might be changed， either now or in the future，so the question of whether or not to allow the defendants more time off prison is one solely for the parole board to decide rather than for judges at sentencing；in other words，they will serve out their full sentences but will become eligible for day parole after six months and full parole after eighteen months.
Another case involves Robert Barjani，a former soldier convicted of first degree murder for stabbing to death Constable Doug Larche near Orillia， Ontaro in Februaryof 1976．Last June an Ontario Court of Appeal judge upheld a lower court ruling which decided that a request by the Parole Board of Canada asking him to explain why he should not receive a lifetime ban from receiving day parole should proceed based on the presumption that he is mentally competent enough to make decisions related to such matters. That means if he does not offer up any reason why he shouldn’t face life behind bars without even having considered the