Recent divorce?

Mark Steyn reports,

It is a grim start to the week with (at latest count) just under 60 dead and more than 500 injured after a gunman opened fire on a country-music festival near the Mandalay Bay resort in Las Vegas. Unlike the ideologically-motivated, social-media-connected, ISIS-inspired "known wolves" of Islam, the Strip shooter appears to be a genuine lone wolf - but a lethally effective one. This was a bloodier attack not only than the weekend's terror incidents in Edmonton and Marseilles, but even than the carnage at the Pulse nightclub in Orlando: It is the deadliest single-shooter massacre in American history. There appears to be no "motive" for it, other than that the perpetrator was said to be upset over his recent divorce. His girlfriend is also in custody, and is reported to be an Australian citizen of Indonesian descent, formerly resident on the Gold Coast.