NAPERVILLE (AP) — Prosecutors say the mother of a 5-year-old girl stabbed to death this week would have had no hint that something might be wrong when she left her daughter with the babysitter now accused of killing the girl and the woman's own 7-year-old son.

Elzbieta Plackowska had watched the suburban Chicago kindergartner fairly regularly since the beginning of the school year, DuPage County State's Attorney Robert Berlin said. As far as prosecutors know, Plackowska has no history of mental illness or hospitalizations. And the investigation has turned up nothing that might have given the girl's mother pause about letting her continue babysitting, he said.

"There was really no indication," Berlin said. "Nothing."