Authorities on Sunday were trying to pinpoint the cause of death for three children an investigator says were found decomposing inside the washer and dryer of their apartment, hours after a woman was accused of killing their pregnant mother and her fetus. Saturday night's discovery inside apartment 28J at the John DeShields public housing complex came two days after the mother of the children — ages 7, 2 and 1 — was found in a weedy lot, her abdomen torn open and the fetus missing. Investigators carried out a furious two-day search, including scouring an 1,100-acre state park, for the...