I am hopeful as the detectives go over all the investigated ground a second time.
This time when statements are taken, LE has so many more details.
IMO finding inconsistencies in first statements or in second statements will be easier.
They have a lot of evidence. A short video, a voice recording, a sketch, dna (I believe they do now), timeline, path to and from the CS and several witnesses.
IMHO, the reason DNA took so long is that they were testing so much material. The forest floor was covered in big dry leaves, forensices swept all that up for testing.
Then they needed to work their elimination process for DNA and touch DNA, everything and everybody the girls recently came into contact with left trace evidence.
As possible examples of what kind of things mightleave touch DNA: If Grandma folded the laundry, Mom gave a hug, a sister lifted the sweater out of the trunk, Grandpa gave a hug, then the professionals and volunteers also need to be eliminated. Searchers, police, coroner, detectives -- thats a lot of DNA. And its on on a lot of surface area, clothes, skin, and all the relavant forest floor and tree trunks.
In July the detective said they were not yet done with DNA processing. But the last statements in October are much more confident about the DNA, and they said they could discover if DN was positively involved within a week. But no POI can be eliminated even if not a match due to that persistent suspicion LE expresses that there was possibly a second person involved.