Actually, I've come to a conclusion on this issue (RH's meaning of MISS-LEADERS) that I feel very sure of! And I thought about this a lot. I now think that the meaning is evident when considered in context of the other items he listed around it. MISS-LEADERS shows up when he's talking about things that could become problems (or maybe DID already) when LE makes a connection to something he used or left behind, or the WAY that he did something (his M.O.), that could possibly lead the investigation in his direction or cause LE to see that the murders are linked to the same killer. Like shoe prints or tire tread patterns. Or consistent patterns in modus operandi (M.O.)
So while thinking of these things (problems) that could lead them in his direction, he adds in the item "MISS-LEADERS?", because he realizes that he might be able to purposefully leave behind certain things, or deliberately do certain things differently, to try to divert attention away from him and lead them to look in another direction AWAY from him. Like maybe leaving something like metal shavings behind (if that's not something he normally would ever have any reason to leave behind.) So now they're going to think they need to look at metalworkers or whatever else that "clue" might point to. Maybe purposefully adding in some shoeprints by the body that are smaller than his own shoe size. Maybe if he mutilated a body in a way he never did before, or "packaged" it differently... anything that would help to MISS-LEAD (mislead) authorities into thinking anything other than what might lead them to him, or to link the murders as having been done by the same person.
He knows what "leads" are, and that they're something good to detectives, but bad for him. So I think he came up with the idea of the opposite of leads, which would be bad for them but good for him. Misleads! Or as he called them, MISS-LEADERS.
So I believe that by MISS-LEADERS, he meant anything that would mislead those trying to solve a crime he committed. Things he could come up with that would help him by diverting attention away from him, and also that could offset some of the negatives created by the things he listed as PROBLEMS. So let's say, if he was unable to avoid leaving tire tracks near where he left the body, it could help to offset that problem, if he could somehow leave more tire tracks that looked different from his tires in the same area (don't know how he'd be able to do that, so probably bad example!) But hopefully you get the idea. (I obviously wouldn't make a good SK because that was the only other example I could think of!) But I feel there would be many other ways if he gave that some thought.
And I think that's what he thought too when he wrote that on his list. And I think it's followed by a question mark, because this was something that he may have only just thought of when making the list, or something that still needed fleshed out (bad choice of words, ugh). So something he still had to think about before doing. Something that he thought of that would probably be helpful, but he still needed to study on more before he knew whether it was a good idea or not.
It seems like it came into his mind as he listed all these things that were potential problems and might get him caught... UNLESS... unless there were things he could do to MISLEAD them on to a different investigative path, leading anywhere but to him. And he obviously thinks he's this super-genius, smarter than all LE anyway, and he may have started thinking he could basically tell them what or how to think, just by purposefully leaving them clues that were really anti- clues! So that he could claw back some of that control that he always felt he had to have in any situation IMO. Committing such barbaric and wild, crazy acts had to necessarily involve giving up some control over the situation, since things never go exactly as planned or the way he'd like them to, since his prey was HUMANS, known to be unpredictable, to put it mildly. Identifying and employing some clever (to him) misleading items or actions, etc. could give him back some of that lost control, allowing him to steer the investigation away from himself
I don't know if I've managed to explain this very well, but I will add that I think it's a very good idea for someone in his position to use, if he thinks about it enough and comes up with some ideas of things that would be good misleaders. It would certainly add confusion, which would make it less easy to solve, and it might even get someone else blamed for crimes he did! If he did it right. Which would be a terrible thing, for everyone, except of course, for him. For him, that'd be the best thing. Anyway, I'm no good at explaining things, but I thought I had to try anyway. I really do think this is what he meant.
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