Oh, I also read last night that the strangulation of Kelsey was by ligature, not just manual. No other clues as to what type of ligature.
I know some people had been speculating he might have had some of those plastic ties with him - seeing as how he was fairly skimpily dressed when seen on the video leaving Target and going to Kelsey’s car.
The thinking was that that could have been how he subdued her quickly, using them as handcuffs. He very well could have been concealing a knife, too, now that we know that was once his M.O.
Maybe he & his wife were into kinky stuff with role-playing...not sure. Here's a cached site of Aletha's where she fears rape.