In the forensic evidence there is reported traces of Zoloft and Alcohol, but there is no mention of wine at the hairdressers or at dinner? Could this suggest ABC drank after GBC went to bed? ABC met with someone else and drank? Prosecution will adduce a reasonable explanation of the traces of alcohol to head that off no doubt.
In bail hearing it was adduced by defence that ABC iphone accessed the internet at around 6.30AM, Friday 20th, and remained connected for 13 hours. The access was at fig tree pocket tower and the assertion was she was somewhere at that time without GBC knowledge. (Could GBC using the find my iPhone app, have triggered the connection to internet on the ABC phone?)
http://www.brisbanetimes.com.au/queensland/gerard-badenclay-denied-bail-20121214-2beo5.html
Hypothetically, GBC and ABC have a fight, kids don't hear it. Both get injuries and ABC ends up outside in the bushes. Close neighbours hear it. ABC puts on her walking clothes and is off on foot towards Kenmore, but without a lot of yelling and screaming.
Although this hypothetical allows a conclusion that ABC meets foul play or commits suicide unbeknownst to GBC, it also allows a conclusion that GBC follows her in a car, and the fight continues towards Kenmore. (Remember the roundabout interest at some very specific times? Searching the industrial bins may have been for ABC phone?)
(Hopefully GBC iphone's "internal" database will put him on Kholo Bridge and a conclusion can be drawn without any doubt that he left the house)
The noises heard by neighbours at distance away from BC house (Kenmore etc) should not be discounted until all the evidence is heard.