Sean Davison says his resolve to reform euthanasia laws remains strong despite a brick being thrown through the window of the Dunedin house where he is serving a home detention sentence for aiding his mother's death.
The brick shattered the window after 11pm on Friday and landed 4m across the living room floor.
Attached was a note which said "Leave Gods (sic) laws or be struck down dead".
Davison is staying at the Kaikorai home of his friend John Landreth, serving a sentence of five months home detention for aiding the death of his terminally ill 85-year-old mother Patricia Davison.
Mr Landreth said he normally sat by the window and could have been killed if he was sitting there when the brick was thrown.
Davison tried to catch the offender but they had run away.
"It's a very serious threat. It's a death threat," he told the Otago Daily Times.
"I've had other threats, but they weren't so specific."
The incident came a day after Davison received a letter in the post with glued-together letters which said "An eye 4 an eye. A tooth 4 a tooth. A life 4 a life. U mother killer".
Davison said he would get the letters DNA tested at the University of Western Cape forensic laboratory, which he heads, and provide results to police.
He said says his desire to change the euthanasia law under which he was convicted was as strong as ever.
"There has been so much support from people. In five or 10 years' time, when the law has been changed, we'll be talking about how we ever allowed that to happen," he said.
NZN