A man accused of murdering his mum has denied he's guilty of her murder on grounds of mental impairment.
Allan Miller entered a not guilty plea in Melbourne Magistrates Court on Tuesday.
He's accused of killing his 77-year-old mum Maureen Miller, whose body was discovered by police during a welfare check on her Blackburn home in July last year.
Miller, 50, is accused of killing her sometime between June 24 and July 5, 2021, after a dispute.
They lived together since 2011.
Miller's lawyer Kyle McLaughlin said the case would be fast-tracked to Victoria's Supreme Court and the not guilty plea was on mental impairment grounds.
He's due to face the Supreme Court later this month.
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