A Nelson woman has been found guilty of offensive behaviour after rat poison was rubbed on National MP Nick Smith.
The politician had claimed that Rose Renton and another protester rubbed rat poison on him while he was at a Saturday market in Nelson in September.
She was charged with offensive behaviour and Justices of the Peace have found her guilty of the charge, RNZ reported.
Renton came to national prominence in 2015 when her son Alex became incapacitated in hospital with a prolonged seizure.
Then Associate Health Minister Peter Dunne approved a petition to the Government from Alex's family to allow him to be treated with a medicinal cannabidiol oil.