and this is how the story moves forward on the case?
Detectives can't actually figure anything out themselves so they magically find a document that explains everything which they will read in ep9 to explain the plot of the show. This writing is terrible this season.
Otherwise was an ok ep. Moved at the speed of a crawl and getting to the parties should have been the mid-season ep4 part. Really just feels like Piz wrote a 2 hour movie-length story and then dragged it out to 8 eps of runtime.
Also the show being 100% predictable on the plot so far is ugh. By ep2 or 3 we pretty much knew that the Casper killing was some how related to the corrupt local politics that happened at the sex parties and that the mayor and those involved didn't want anyone looking into the stuff so they setup the investigators with the meth house gang to have the meth house gang get killed and framed for the killing and the file closed (and with any luck kill the investigators). By ep6 of 8 all that's happened is the show slowly showing us (and having the main characters figure out) what we know already. It's completely unsatisfying and comes across as a really low-brow plotline. The only thing interesting is what was the deal with Casper's killing, which they're saving for the last 2 eps to get into.