It looks like the grow operation was spotted by fisherman and loggers from adjacent properties, who then ratted out the growers. Along with aerial surveillance , the authorities already had legal evidence that there was a large grow operation, they just didn’t have 'proof' that it was the property owners that were managing the operation.
On June 18 another fisherman contacted authorities of a large growth just off Middle Inlet Creek, north of County Road X and provided a map of the location. Also observed was a pump next to the stream, power cord, makeshift bridge and a shed in which someone was sleeping.
They likely had enough evidence without the hidden cameras on the property. I think they did it, knowing it would likely be thrown out as illegal, but it wasn’t.
Property photo from Google Maps:
N12309 South Hill Road, Athelstane Wis
Based on what I understand from the article, this confession was based on the... what should be, illegal warrantless cameras.
Brian Magana was interviewed and admitted purchasing the Middle Inlet property with his uncle, Manual Mendza and that the properties were purchased for use in growing marijuana for sale. On July 4 he along with his mother and uncle, Marco Magna and two others went to the Athelstane site to take seeds from the marijuana plants.
Makes the case a lot easier to prove.