he'll life loo i'll leave that to the investigators. i believe we've been relatively free from mass killings in australia, last nearly 20 years, in part because of the strict laws that are in place. it's important not to draw the wrong conclusions from this incident. we should look at the span of the last 20 years, where through good police, intelligence work, from our security agencies and in partnership with our friends around the world, including here in the united states, we've been able to manage a relatively peaceful environment. >> the gunman was well known to authorities. he had a violent past. he was an accessory to a murder in the death of his wife. he was charged with sexually assaulting a young woman who had visited him for quote spiritual consultation. he had written offensive letters to the families of deceased australian soldiers. so was yesterday to your mind, a crisis of islamic extremism? because he had pledged allegiance to the leader of isis? or was this just a violent