Octavo
Illuminator
You have to bump him off and the wife, who might start screaming (any screams heard from neighbouring property? How about signs of a break-in?) and then the other male and then the sister. I can imagine a lot of commotion. The layout of the house showing where everybody slept would be interesting.
I've not heard reports of screaming, however police have confirmed there are no signs of a break in.
And the killer used and left behind a new axe. Hmm. Are guns hard to come by in SA? I guess an axe is quieter so long as you can be sure about the no screaming part and you aren't too squeamish. Is it easy to kill four people with an axe? Do you need some training?
The latest reports indicate that the axe was recently sharpened. It's unclear if that means the axe was actually old and just recently sharpened or if the axe was bought recently and then sharpened or what.
There are also unconfirmed reports that the police are close to an arrest and further reports that prosecutors may offer institutionalisation at a state psychiatric facility. All of this is rumour though - the news report is weakly sourced.