I’ve just read a further excerpt from The De Zalze Murders on Amazon. Julian Jansen has been following the entire trial and included the following in his book which we haven’t heard before.
“His wife and teenage daughter, terror-stricken, are fleeing down the passage towards the stairs leading to the ground floor. They have to pass the room where the screams have now fallen quiet.
The attacker blocks their path. The mother rushes straight at him”.
https://www.amazon.com/Zalze-Murders-Behind-Brutal-Attack-ebook/dp/B078C8JMYH
HvB said Teresa called out, “What’s going on?” At that point, after hearing no reply or cries for help from either Martin, Rudi or HvB, Teresa and Marli may have assumed that there was an intruder in the house, and they attempted to leave and get help. However HvB upon hearing his mother’s voice, would have instantly left the room with the bloody axe in his hand, and it's obvious that they too had to be attacked and silenced.
We hypthothesised the delay of 2hrs 40mins was to 1) hope that Marli would die in the intervening period, and 2) allow him time to stage the crime scene. It’s also possible that if, as we suspect, Rudi was always the main target (his injuries were the most devastating), that it was essential to ensure he too was dead.
Dr Anthony performed the autopsies. She said Rudi was alive for a while after sustaining his injuries because he had swallowed blood. While she was unable to state how long it took before he died, she said it was longer than a few minutes. The blood spatter expert, Marius Joubert, told the Court that Rudi may have been alive for nearly three hours. His body was found in the doorway of the bathroom. With his shocking injuries, it would have taken quite some time if moved there himself, or alternatively HvB moved him there.
I suspect that after the killings of both parents, he immediately went downstairs, had at least one cigarette and some alcohol (Dr Van Zyl said that during her first treatment of HvB he smelled of alcohol). When he returned upstairs, he realised that not only was Marli alive, but so too was Rudi, and he had to wait for them both to die but Marli clung to life. He utilised his time to set the scene and only when he realised that he couldn’t delay much longer as the domestic worker would be arriving for work at approx. 8.30, he made the emergency call at 7.12am and was on the phone for20-30 minutes.