Deeper Into the Case: The Timeline That Put Sef Gonzales in the House
If you want to understand why the jury convicted Sef Gonzales, the timeline of 10 July 2001 is one of the most important parts of the entire case.
Sef had an alibi. In fact, by about 7:45pm, the Crown accepted there was credible evidence placing him with another person. So the prosecution had a very specific problem to solve: if Sef killed all three members of his family, the murders had to fit into the hours before that alibi became solid.
4:04pm — Clodine's phone
Clodine Gonzales had turned 18 the day before she died. Telephone records showed that she used her mobile phone at approximately 4:04pm on 10 July to send a text message.
The Crown case was that Clodine was killed at about 4:30pm. That phone record mattered because it provided an objective marker showing she was alive shortly before the prosecution said the first murder occurred.
Around 5:30pm — Mary arrives home
The prosecution case placed Mary's death at the earliest at about 5:30pm. The timing wasn't plucked out of nowhere; the later appeal proceedings examined the evidence around the family's movements and the competing expert estimates of time of death in detail.
This gap between the deaths is important. The Crown wasn't alleging that three people were attacked together in one chaotic event. Its case involved separate killings as members of the family were at the house at different times.
6:23pm — Teddy makes his last call
Then comes one of the strongest fixed points in the timeline. Teddy Gonzales made his last recorded mobile phone call at 6:23pm. The call was to the landline at the family home, and he was calling from Wentworthville.
When Teddy's body was later found, he was in the entryway and still wearing the clothes and shoes he had worn to work. The Crown case was that he was killed at about 6:45pm, shortly after arriving home.
Why 7:45pm mattered so much
By about 7:45pm, Sef had what the court later described as credible alibi evidence involving Mr Dacillo. That meant the prosecution timeline had to put all three deaths before then.
And this is exactly why later arguments about time of death became so important. If reliable evidence had shown that even one member of the family died after Sef's credible alibi began, it could have seriously weakened the Crown case that he killed all three.
The problem with estimating time of death
Years later, Sef relied on expert evidence about estimated times of death as part of another attempt to challenge his convictions. But the court also had to consider evidence that didn't depend on estimating body temperature or other post-death changes.
Clodine's 4:04pm text was one example. Teddy's 6:23pm phone call was another. Those records were difficult to reconcile with expert estimates that suggested substantially earlier deaths.
The 2018 Supreme Court decision examining Sef's application went through those conflicts in detail. The court noted that the timing was significant precisely because of the credible alibi from around 7:45pm.
Sef Gonzales' other alibis
At his 2004 trial, Sef said that on the night of the murders he had been with a sex worker and later with friends. The jury ultimately rejected his account and accepted the prosecution case.
But there's an important distinction here. An alibi being rejected doesn't magically prove somebody committed murder. The Crown still had to prove the killings and Sef's responsibility for them beyond reasonable doubt. The importance of the alibi was how it fitted — or failed to fit — with the rest of the evidence.
The evidence wasn't one smoking gun
That's what makes the Gonzales case interesting when you strip away the sensational headline. The prosecution case wasn't dependent on one perfect forensic clue. It was cumulative.
There were the phone records fixing parts of the family's last known movements. There were Sef's explanations of where he had been. There was evidence of earlier alleged attempts to poison his mother. There were the false trails the Crown said he created. There was his university situation and the alleged financial motive. And there was the physical evidence from inside the North Ryde home.
The timeline the jury accepted
Put simply, the Crown's sequence was: Clodine alive at 4:04pm and killed at about 4:30pm; Mary killed no earlier than about 5:30pm; Teddy still alive at 6:23pm and killed at about 6:45pm; then enough time for evidence to be dealt with before Sef's credible alibi from about 7:45pm.
That narrow window is crucial. It explains why phone records that might sound mundane in another case became so important here. A single call or text wasn't proving who committed the murders. It was helping define when the murders could — and could not — have happened.
And the jury didn't take long
After hearing six weeks of evidence, the jury deliberated for about four and a half hours. On 20 May 2004, Sef Gonzales was found guilty of murdering all three members of his immediate family.
His convictions were later challenged. In 2007 the NSW Court of Criminal Appeal dismissed his conviction appeal and his application for leave to appeal against sentence. Later applications also revisited aspects of the evidence, including the timing of the deaths.
That is why, more than two decades later, the 10 July timeline still sits at the centre of this case. If you want to know how prosecutors placed Sef inside that house before his later alibi kicked in, this is where you start.
Verified timeline
4:04pm — telephone records showed Clodine used her mobile phone. About 4:30pm — the Crown placed Clodine’s death. About 5:30pm — the prosecution placed Mary’s death no earlier than this. 6:23pm — Teddy made his last recorded mobile phone call. About 6:45pm — the Crown placed Teddy’s death. From about 7:45pm — later proceedings described credible alibi evidence involving Mr Dacillo. The timing mattered because the Crown case had to place all three killings before that later alibi.
Sources
Key sources used for this article include Gonzales v R [2007] NSWCCA 321; Application by Sef Gonzales pursuant to s 78 Crimes (Appeal and Review) Act 2001 (NSW) [2018] NSWSC 787; R v Gonzales [2004] NSWSC 822; and ABC News reporting from the 2004 trial and verdict.
