Deputies in Washington Parish have arrested a 12-year-old girl for the attempted murder. They say she tried to kill her 8-month-old niece. The Sheriff's Office says they responded to a call from the Department of Children & Family Services of alleged abuse of the infant. Detective say that under questioning, the girl told officers she'd grown jealous of the attention her older sister's baby was getting, so she tried to kill the child. Police say she attempted to give the baby an overdose of liquid medication. The 8-month-old child was treated at the hospital and has recovered. The 12-year-old aunt is in custody and awaiting a date in juvenile court.