We just passed the two year anniversary of a 16 year old kid getting shot in the head in a house in my neighborhood. It seemed strange (and disconcerting) that we received no news about any danger, a killer on the loose, etc.
I have family members in the school district - the victim was a student of one of them. After much prodding of police officers assigned to local schools, it was revealed that LE knows the shooter but needs to build a case. Comforting to us, but not enough for the victim's father who committed suicide in grief.
The point is that LE in KC may know WAY more than they are sharing with us. What if, for example, they already have possession of Toni's car? What if forensic evidence indicates a fatal loss of blood? Recall there was surveillance footage released in the Baby Irwin disappearance in KC, so it's not they refuse to release helpful information in all cases. This would also explain Toni's parents getting out of the way.
I'm guessing all eyes are on Pete Jr. and Pete Sr. (who, again, looks like a stand-up guy on FB) is doing all he can to mitigate what will be called a "rush to judgement" if/when his prodigal son is arrested.