A jury has been unable to decide whether a wheelchair user who walked around naked for more than an hour before stabbing a woman to death committed murder.

Mark Ludbrook, 53, admitted he killed his friend Autumn Baker at his Hoppers Crossing home in Melbourne 's south-west on August 3, 2023.

But he denied he was guilty of murder, claiming his mind was altered by the illicit drug PCE and he had no control of his actions.

The Victorian Supreme Court jury was told Ludbrook took the drug on the morning of August 3 to manage chronic pain from his diagnosed transverse myelitis.

His carer Amber Davison described his strange behaviour before the alleged murder, where he was seen walking around naked despite normally only managing three steps at a time.

Ludbrook also thanked different co

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