A murderer will face his former girlfriend's family after admitting he killed the 23-year-old and then tried to stage her death as a suicide.

Lachlan Young, 23, denied he murdered Hannah McGuire, claiming her death was a spontaneous incident as he took the case to trial in the Victorian Supreme Court.

But after eight days of evidence before a jury, Young admitted he killed his former girlfriend.

Young had been controlling and abusive towards McGuire and intervention orders were taken out against him, the jury was told.

After the second court order was made in March 2024, Young realised his relationship was over so he decided to kill McGuire, prosecutors said.

Young told a workmate on April 2 that he would "roofie" McGuire, drive her out somewhere and crash the car while she was uncons

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