I'm not an expert in serial killers, so my opinion is formed from news, plus maybe watching Dexter and Silence of the Lambs, etc. In thinking about this case, it struck me that many (most?) serial killers don't seek to be known. They are hunters and they want to continue to hunt, so they want to stay under the radar screen. Their compulsion doesn't necessarily include a desire to do something so brazen, something that is by its very nature will draw an immense amount of attention and create a level of risk of being caught that is so high. IMO, BK thought he was going to be the most clever serial killer ever, that his studies and his intellect (in his own mind) would allow him to pull off the most public and sensational and violent and brutal murder. Such hubris, such an unfathomably high opinion of his own abilities. IMO. (He studied under a
famed serial killer expert which is what makes me think that he thought he knew enough to get away with it all.) I hope this makes sense...