Net cast wide in WA for missing mum killer

Police have widened the search for a killer who has absconded from a mental health facility in Western Australia.

Samuel Mark Walsh, 38, otherwise known as Enoch Samuel Wright, has not been seen since Sunday when he failed to return from an authorised leave of absence to his accommodation at Romily House, a low-security hostel for people with chronic mental illness.

Walsh was found not guilty in March 2007 of murdering his mother at her Kalgoorlie home two years earlier.

Supreme Court Justice Geoffrey Miller ruled Walsh, who was diagnosed with chronic paranoid schizophrenia, was not criminally responsible for his actions because he was not of sound mind.

Walsh had been granted regular leave since January 2008 and complied with the conditions of his supervised release in the past.

Acting Police Commissioner Stephen Brown said Walsh could be anywhere in the state and police were not looking in one particular area for him.

Concerns are held for Walsh, who requires regular medication but is not believed to have it with him.

Police say Walsh is unpredictable and should not be approached.

He is described at 182cm tall, of slim build with brown hair and blue eyes.

It is believed he is driving a 1998 silver Hyundai Excel hatchback with registration 1AFY124 and may be heading towards the Goldfields.

Anyone who sees Walsh or the car is asked to call police on 131 444.