Rosario DiGirolamo faces a 25-year prison sentence after admitting to killing 27-year-old Amy Giordano of Hightstown in June 2007 and dumping her dismembered body in a New York pond.
The Times of Trenton reports newly discovered evidence that DiGirolamo had done a Google search of the phrase "lethal karate blows to the back of the head" days before the killing convinced him to take a plea deal.
Defense attorney Jerome Ballarotto says the Google search evidence was "catastrophic."
DiGirolamo left the couple's 11-month-old son in the parking lot of a Delaware hospital.
--- Information from: The Times