I've been puzzling that too. Where was SS Mom at this point? If home with the dogs, did she let him in? Did he try to get in without waking her, and failed because the keyless entry was down? Or did she wake up and let him in and they've lied about it?
I'd bet that he tried to get in without waking her and failed to get in. However, after seeing Mom in the recent interview, she seems like the type that could enable her son and agree to keep it a secret from Dad and LE.
IMO, the barking dogs alerting and DS said it was probably a critter, LE does have evidence he was there trying to use their wifi. and she happens to know exactly the time the dogs were barking saying she looked at her watch? IIRC that time would not place him there.
IMO, they knew alot about their son's comings and goings, because basically as his father says, it might involve their money. it appears they were presenting their h/w relationship as they didnt discuss his comings and goings with each other. I call BS on that: his father is all shady IMO talking about SS's plans, CS didnt know the plan until last minute?
portion of their LE interview:
CS addressing DS: was the invite on Saturday or or did he just say Sunday I'm going to Kissimmee...
DS: no we knew we knew,
I knew the week before because I found the uh the gifts for Maddie *
then further in talking about SS and his anxiety and looking for the meds on saturday and then when asked about why 'something was odd about SS's demeanor on saturday: (just a portion of his explanation below, they go on and on)
CS: not angry upset but just something worrisome just seemed like there was something that was really praying on him and it was not settling well with him...
Detective: and that's when he was told you guys he was going to Kissimmee or did he tell Mom prior to that?
CS: well he was making he was making plans to go to Kissimmee and he was and I don't know exactly when this happened whether he told me on Saturday but I knew he was leaving Sunday because we talked about the expense of that trip and Jen and he said well Jen's going to pay for the trip because I was I was done paying for this stuff and and he said well Jen's going to pay for it you know I said well go down and fill up the car and I'll take care of that that would be enough gas for him to get up and get back because that's all he was going to do and so I'm I'm assuming that the plans were submitted on Saturday but you're telling me (addressing DS and she hm hm's) that you knew about a week in advance and maybe he started planning that a week in advance
but I was I wasn't aware of it until last minute
Det: but he didn't have this fearful reaction earlier that week it was just that Saturday?
CS: yep
Det: did he say how long he planned on staying in Kissimmee?
CS: a week a week, yep I was planning for,
I, we were planning on him going be to be gone for a week because we were welcoming the break