This is a mucky subject: Cow effluent and the alteration of documents used for a court prosecution, which has people asking some serious questions about Environment Southland and its methods of enforcement.
Now to put things in context a little bit, a dairy cow can produce more than 50 litres of waste per day. Yes that's a lot, but it's one thing when those cows are on a farm, and another thing entirely when you're loading up a truck with 40 cows for a two or three hour trip.
The effluent still has to go somewhere.
It's been an ongoing battle between Environment Southland and local truckies for years, with the transporters claiming the regional council has failed in its duty to install dumping stations.
But now the issues ended up in court amid claims that Environment Southland altered documents, and wrongly used police as part of an enforcement operation targeting truck drivers.
Watch the video to see John Sellwood's report.