A Kiwi farmer taped him, anticipating he'd need it for evidence in court.
But industry body Summerfruit NZ says it's a biosecurity issue.
Cory Jefferies was found guilty of murdering the mother of his three young children.
It portrays Teina Pora as innocent and could influence the jury.
Jefferies had admitted to manslaughter but denied murder.
Cory Jefferies' lawyer says they have "nothing to prove".
Her partner Cory Jefferies is charged with her murder.
The accused says he admits manslaughter but not murder.
Two-year-old Arnica Savage was found in a river late on Sunday night.
She won't have to repay more than $100,000 of benefit money.
He was sentenced to a minimum non-parole period of 17 years.
He had already been accused of sexual connection and indecent assault.
"The defendant is still guilty of murder, even if the person he killed was not likeable."
She detailed a night when he allegedly beat her in front of their kids while high on meth.
The activist says stress over the forced sale of her home has made her sick.