PITTSBURGH (AP) — Authorities say the death of a toddler who reportedly was kidnapped near Pittsburgh last weekend has been ruled a homicide. But a cause of death for Nalani Johnson won’t be determined until officials review the toddler’s medical records and more tests are completed. Johnson, who was to turn 2 this month, was found Tuesday in a park about 37 miles east of Penn Hills, where authorities allege the girl was kidnapped Saturday evening. There were no visible signs of trauma.