From your link as well -
“But there's been no signs of Carpentier, 44, the suspect investigators have identified as key to understanding what happened to the young sisters.”
If there was clear evidence both girls were murdered, I would’ve expected murder charges would’ve been laid by now and MC would be sought with an outstanding warrant for his arrest. Instead it appears as if he’s wanted for questioning regarding his daughters’ deaths.
I’m not sure what to make of that. Just speculating, there could be doubt over how their injuries were caused (for example - severe head trauma - car accident or inflicted by MC?).....or even if the autopsy deemed homicides occurred, LE believes there’s a strong likelihood MCs already dead, or will be, so regardless there’ll be no arrest.