"The laws need to change and become more stringent," she said.
Steve Clerk, chairman of the Auckland branch of Supporting Families in Mental Illness, said the incident was a tragedy that highlighted the fact that more support was needed for those with mental illness.
"Supporting Families in Mental Illness has long held concerns over the lack of suitable and supported accommodation for people living in the community with a major mental illness," Mr Clerk said.
On an online tribute page, friend Brett described Mr Clark as a strong but gentle and humble man who was a great friend.
"Dean, you were my brother and my dearest friend. You were always there for me when it counted and I am so sorry I couldn't be there for you at the end. The world has been robbed of a wonderful person," he wrote.