I'm seeing two issues, then: content and timing.
As for content, it's clear that the issue is linked*, as seen from the short text version on the KTLA website:
A woman slit her daughters' throats before slitting her own early Friday evening, claiming that "the Tribulation" was going to occur and she wanted to prevent them from suffering through it, officials said.
As for timing, the website you are talking about does make it look like it happened in May. I have to admit I was fooled, I focused on the number and missed the month, myself. I'm going to hazard a guess the reason it is getting play now is people are actively looking for such stories.
So, assuming the KTLA version is accurate, what happened? Did we just see a woman who didn't wait until only a few days until 'the end' to do something out of fear of the Camping prediction?
*I'm assuming direct reading from KTLA is considered a respectable source for this, in retrospect. Also assumed, is 'The Tribulation' is a reference to Camping.
Edits: for footnote