This is a very fair point to make.
There are two current ways this is playing out, as I see it so far (would love some feedback or alternative views! MOO.)
SM (alone) is involved. She has approximately 90-120 minutes to commit the act and hide Gus’ body. This doesn’t factor in any potential emotional reaction to having either lost her temper/witness Gus die(?)/accidentally harm him.
This allows JM & the mother to still have corroborating stories and gives reason for LE to notice how SM’s account may have been altered.
JM is involved (& therefore, they all are). For JM to be responsible, then all three know to some degree what happened—the mother, for agreeing to lie about an alibi that sets JM 10km away from Gus’ last “known” whereabouts, and SM for being the last person to witness Gus playing in a dirt mound.
Why the mother would lie is the real question. I can confidently say that if I were a mother, there is no amount of begging or pleading that either of my parents could do that would prevent me from telling the police what happened (homicide or manslaughter). However… and I’m still looking for a verifiable claim, but I know it has been thrown around in this thread that the grandparents have custody(?) of the children (custody records aren’t public access, and I don’t see any sealed report to even point to that likelihood), then I can at least understand why a mother might pause and cover up for their parents actions to still physically see the one year old they may not have legal access to anymore.
Throwing this out there (IMO only): Given the family’s reluctance to release a photo of their missing four year old, there really are less and less excuses (as flimsy as they were to begin with) now that police have ruled out Gus having wandered off, or an abduction taking place, for the three of them to feel comfortable enough to allow the Australian public to work off of only from basic visage details. There’s already been discussion of the photo provided resembling what might be a bruise under Gus’ right eye, and while that’s contentious due to shadows and lighting, now that this is likely confirmed foul play (to whatever extent: homicide, or manslaughter), it’s not a horrible stretch of the imagination to assume it was difficult for the three to even find a photo of Gus that might conceal more abuse?
This is only a stray thought, though, as I’m sure LE have access to other pictures of him that might point to the contrary (unless the claim of Gus being quite adventurous is a justifiable reason for the child to be covered in bruises & scrapes fairly often—fair, as an Aussie, when weren’t we outside running around w/o caring for our own safety lmao).
All this to say—has anyone who knows the family personally stated in the media when they had last seen Gus?