I'm with you - thankfully the BIL did mention in the interview clip someone posted today that they're consulting with child psychologists.
Still rubs me the wrong way for some reason. I'd expect a professional spokesperson or lawyer at this point, as well as a public-facing lockdown on the family, especially the kids.
There's really no need, especially right now, to be giving podcast interviews about how you don't know how to tell the kids that their parents are dead. He seems very lost despite psychologist involvement. It makes me wonder if the psychologist is a police resource and not somebody the family hired to work with the kids.
It makes much more sense, IMO, to close ranks, use the dad's lawyer connections to get a spokesperson, and release a simple "This is an indescribable tragedy. The family is appreciative of the outpouring of love and support from their communities. The children, of course, are the family's priority at this time. They are physically safe in the care of loving relatives and are receiving external support as appropriate. The family respectfully asks for privacy at this time as they continue to grieve and pursue justice. Please contact police directly with any tips." statement.
I understand clearing up misconceptions, but the whole thing is very chaotic. Even his reference to the kids staying with multiple family members over the last week is a little weird - why wouldn't you keep them stable during this? In the absence of a police request to move them, of course.
Part of me thinks the BIL is panicking and this is his fight or flight response and part of me thinks he likes to hear himself talk. I don't think he's involved, though.