The SPCA received a complaint about the horse's condition 15 months ago, but was satisfied then the owner hadn't breached the Animal Welfare Act.
On one trip, a skipper was noted telling crew to kill "as many as possible".
The incident posted to TikTok falls outside the time-sensitive window needed to charge the New Zealand Olympian.
But animal rights campaigners wonder how often the Kiwi icon has committed such acts over his career.
The clip posted to TikTok shows Sir Mark hitting a horse as it stops in front of water.
Police allege two men chased a flock of wild ducks before capturing one and decapitating it.
The coach struck the horse with her first, but won't be punished for animal cruelty.
The video has been viewed more than two million times.
The dogs from a rural pound were shot due to social distancing.
"I almost can't describe how I felt at that moment. It was like the worst possible nightmare."
The man has been told he can't use the state's 'stand your ground' law to defend himself.
Newshub this week revealed Dora Ryan has been lying low in rural Northland under a new name.
Aussie authorities have a warrant for the arrest of Dora Ryan, who has been found guilty on 33 animal neglect charges.
The latest case has prompted animal rights group SAFE to call on the Government to halt all greyhound racing .
Eight birds have been shot dead at Auckland's gannet colony in Muriwai, and the police want help finding who's responsible.
A duffle bag filled with puppies dumped in a river and a dog with rotting flesh are among this year's worst offences.
Cat owners who don't believe in desexing are partly to blame.
They've launched a petition demanding action against animal experimentation.
There is concern that once animals reach their destination, they could be slaughtered using outlawed methods.
Air guns only hold one pellet at a time, so it would have taken some time for the awful attack to have played out.