From your link:
"The idea of not photographing the evidence in the Steven Avery case, you just can't escape that," Turvey said. "It is either because of apathy, you just don't care, or corruption, they are willfully depriving the investigation of evidence in order to obscure the truth. It is not lack of training.
"Taking photos at a death scene is not some mysterious art form," Turvey added. "The question is: 'Why didn't they do it in this particular case?'"
This pretty much sums it up as:
corruption.
The first step to reversing this bizarre frame-up by local police is to fight for the rights of the nephew. There is absolutely no doubt that he was a pawn in this case. The forced, false statements from the nephew against Avery should form the basis of national education about what not to do in a police investigation.
Teresa Halbach's family should not be satisfied with the explanation they have been dealt to explain her murder.
Someone with authority needs to release Avery and his nephew from prison, and demand a thorough investigation in the death of Haibach. It is not sufficient to accept a statement from police about how her remains were found. The remains had to be photographed, and they weren't. Police botched the investigation from the beginning because they planned to frame Avery for her murder. They should all be fired for incompetence and corruption, and the entire investigation should be started from the beginning with fresh eyes and a fresh team. If there is no photographic evidence of bones in several burn barrels and locations, then it didn't happen. That's how it works in every other trial. That's how it should have worked in the trial for the murder of Teresa.