From ARW's second link:
"But police found blood on sheets in Harris bedroom as well as blood in the hallway outside the room where Amierah slept. Harris was supposed to have been watching the girl since Friday when her mother left for work, Mack said. The childs mother had not seen her since then, Mack said.
When the girls mother was driving back to the couples apartment Sunday night, she spoke with Harris about their plans to eat out that night, Mack said."
So, "mother" left Amierah with 

from FRIDAY until SUNDAY??? Is this correct? Or just a typo??? What happened to her story that she only left her on SUNDAY? When she went to work...