It seems these types of stories follow a common narrative:
Biological parents are not together (eg: Jadianna Larsen, Maleah Davis and now Amari Nicholson)
Another person (boyfriend, stepfather, babysitter) steps in to care for the child
Some wild, cockamamie story is invented to explain why the child has mysteriously disappeared
Investigative work is done; stories start to fall apart
Someone is arrested for murder.