An autistic Perth man has been sentenced to life with a 20-year minimum for murdering his mother to get her money.
Read More. Brent Donald Mack, 27, was found guilty of killing Pauline Mack, 56, whose body has never been found.

Mrs Mack had not been seen alive since September 2008 and her son had taken hundreds of thousands of dollars from her account. Mack had repeatedly lied to relatives claiming his mother was alive and living in another suburb but he was charged with her murder in 2010. Supreme Court Justice John McKechie found that Mack murdered his mother to obtain her money and he described Mack as dishonest and devious. Justice McKechnie also found there was no causal link between Mack's autism and his crime.
"''Josh was going in and out of the street and within seconds of him coming out the fire started there, and that's why I kept saying 'Well, why were you down there?''' Then 18,
Mr Staples explained he had driven down the streets to think, Mrs Heron said. Mr Staples's barrister, Michael Coroneos, said Mrs Heron, who at one point looked across the courtroom at her grandson and cried, saying she could not lie for him, had put on a performance while in the witness box."