Hi! This is my first time posting here. I actually just signed up today, I got the link to both the blog and this forum from someone else. I've been reading this thread all day to get through it all and finally have. I apologize in advance if I repeat something that's already been addressed, my reading was broken up.
A couple of things stand out to me.
The possibility that the stalker was listening in to the LE action via police scanner, whether an actual scanner, listening online (some 911 services have their scanners streaming to the internet), or via a walkie talkie that picks up the frequency. This could allow the stalker to stay up to date one what's going on with the case, to some extent.
The stalker would not at all need crazy military experience or to be very old to be able to pull off the tricks and escapes that it seems (s)he did. A background in hunting and woodsmanship, perhaps even scouting, could easily explain this. Many of the families I know who are avid hunters have their kids learning about stalking/tracking prey, avoiding detection, etc. from practically before they're even born. My family wasn't into hunting but I knew how to get around quietly and how to climb a tree to get onto the roof and cross the roof quickly and silently before I was even in high school. My dad was the one who taught me and he could also get around on the roof without making noise, and he wasn't exactly a little guy. A utility belt or vest of the type people have already posted about could easily have explained "all the gear" the stalker was carrying and allowed him to get up on the roof without leaving any gear on the ground but with both hands free.
As far as the fact that the windows were left open, my impression is that the windows were only being left open at first and that once they really realized they were dealing with Trouble/a stalker, they started securing the house better, to include putting coverings all the way up and down all windows/glass doors to the outside. If I had a family member who had previously had health problems due to carbon monoxide, I'd probably be pretty reluctant to shut up the house like that before I realized what exactly was going on.
I think it was on here that I've seen people saying "Why didn't they just get an alarm system" but it could have been elsewhere. My thought regarding that is, how do you go dashing out of the house in a hopeful attempt to catch the stalker when you have to stop and disarm the alarm?
On the topic of the stalker in the wildlife cam picture possibly looking feminine, if this is the case, that would definitely lend credence to there being two people doing the stalking at the house, as M's mom states specifically that the person she saw through the front door was definitely a male.(August 25th, Day 24,
http://morganingram.com/wordpress/?p=765). Also, on the same post, after M's dad goes outside looking for the stalker, he says that everything was quiet and dark except for one light being on in J's house... isn't that the house that B and K live in?
I've also had my wonderings about E. I can see his over-attentive concern and helpfulness being a suspicious thing, or being a natural desire to help as the father of young daughters who lives nearby and worries about being caught up and dragged into the mess. If it's the latter, it's entirely possible that he is socially awkward and just doesn't realize how he's coming across. If it's the former, the fact that he wasn't home when one or more of the incidents happened doesn't disprove him of guilt considering that a main theory across the blog and multiple forums/groups seems to be that there were multiple people working together.