I think the banging sounds the neighbors heard early the next morning were Dulos breaking down his "beloved", and unique childhood bike. That bike label is also going to come back and bite Mr. Patter right in the tush! This is not a common bike, can clearly be tied to Dulos (it can actually be seen in the back of the Toyota in surveillance video), and it disappeared immediately after Jennifer's murder. Juries just love that type of unique evidence.
IMO, there is a LOT more evidence like this out there, because as has been posted here, Dulos created way too many opportunities for LE to connect him to this murder. In that sense, he was really, really dumb. More contact points, more evidence. It really is that basic.
If I were KM's lawyer, I would be knocking the prosecutor's door down for a deal. Such deals are necessary evils and it now appears he MAY be the least culpable of the three of them. That, of course, is speculation on my part, but at least there is yet another person who can help convict the Devil.
KM's career is over. He is going to get disbarred. He needs to understand that the only way for him to potentially lessen his prison sentence is to cooperate, completely and truthfully. Whether he chooses to do so is another matter. Dulos has put KM squarely in the middle of this conspiracy, so KM should know exactly that the only person Dulos will "save" his himself.