Justice Patrick Keane did not enter a conviction but remanded Crutchley to appear in court today for a sentencing date to be set, The Waikato Times reports.
Mrs Crutchley was in the final stages of terminal stomach cancer, and died within hours of her son giving her an overdose of her drugs, which included a cocktail of morphine, painkillers and anti-anxiety medication.
Mr Laybourn said there was "huge sympathy" for Crutchley.
"He's prepared to take his medicine and be sentenced, but he certainly wants questions asked about why he was put in that position ... when he just wanted to spend his last hours with his mum."
Outside the court yesterday, Crutchley's sister Diane Millins said she was stunned at the verdict.
"I just can't believe it's turned out the way it has. I think my brother's innocent, I think he was put in an awful position when my mother was suffering," she said.
Crutchley told the court he never wanted to kill his mother.
The crown said Crutchley would have known his mother would have died following the increase in medication.
- NZPA