Corona couple who killed newborn daughter and left body in cardboard box have pleaded guilty to murder

( Oscar Flores )

A Southern California couple who killed their newborn daughter and left her body in a cardboard box have pleaded guilty to murder.

Eighteen-year-old Joshua Benson of Corona and 23-year-old Shawna Andritch entered pleas Tuesday to first-degree and second-degree murder, respectively.

Each faces a potential life sentence. Prosecutors say the couple killed the newborn last year, then wrapped her body in a T-shirt and placed her in a box with a blanket and a stuffed animal.

A landscaper found the box near a drainage tunnel running under Interstate 15 in Corona.