In a discussion I had with dozens of parents with adult kids, some of them LE, all of them law abiding, none of them would have done. Doesn’t mean they are right, but any LE and attorney will tell you that it’s not a good idea to talk at that point. Regardless of their cooperation, Laundries were almost certainly going to be sued to ruination because of what their son did. It’s not like they had any good news for Gabby’s family either.
My initial reaction to this case was to be appalled about Laundries’ reactions , but n time, I can see why Laundries and their attorney taking the path they have. BL, a whole other story. But MOO, parents may not have known. BL could have come home and just refused to talk about it, and I certainly would not have suspected that Gabby was just left, let alone killed.
And, yes, when messages came from her family indicating something ominous, yes, I’d call someone with experience in this sordid mess. I would not know what to do.