Yikes!
I’m an identical twin, so I’m always drawn to cases involving twins. (Even though we identicals view fraternals as just siblings with the same birthday, lol).
My only experience with sleepwalking involves my former husband, over forty years ago.
One night I woke up to him hopping on one foot, clapping his hands, and saying something about killing bugs. (There were no bugs).
So this was a very mild incident, but he had absolutely no memory of it.
Our mother used to tell us that my twin and I would have long, involved conversations when we were asleep, though neither of us ever recalled them at all. Of course that’s not sleepwalking, though.
I’m very torn about this case.
Most of the cases I’ve heard about involve a husband killing his wife while allegedly asleep.
Just guesswork, but I’d imagine that if this really happened due to sleepwalking, it would be easier to just turn around and kill someone in your own bed. A brother and sister would necessarily entail him getting out of bed, getting a knife, and then going to his sister’s bed.
I’m wondering as many of you are as to why the parents didn’t want to let LE enter the home. I’m sure they were in anguish, but still.
In the end I think these cases are difficult to prove, so it will all come down to what the jury finds plausible.
The fact that there was a call for a prior incident in the home would make me lean towards skepticism, I think.
Just my own speculation.
Some other cases:
'Sleepwalking' killer Scott Falater still wracked with guilt over murdering wife
A man calling 911 in North Carolina told the operator he woke up from a dream and found his wife stabbed to death in their bedroom.
abc7ny.com