A defense attorney in Ohio said Monday that it wasn't the mother, but someone else who killed a month-old baby by burning her in a microwave oven.

Defense attorney Jon Paul Rion told jurors during opening statements that a cousin of the baby told to two friends: "I know who killed that baby."

Rion says in that conversation, days after the 2005 death, the cousin allegedly confessed that he had put the baby in a microwave.

China Arnold, 28, has pleaded not guilty to a charge of aggravated murder in the death of her daughter, Paris Talley.

Prosecutors said evidence will show Arnold was responsible for the death. Arnold could face the death penalty if convicted at her retrial.

A judge declared a mistrial in February after privately hearing testimony from a juvenile who said he was there the night the baby died.