A suburban Philadelphia woman and her boyfriend have pleaded guilty to killing her father, after which prosecutors say they tried to dismember the body with a chain saw and then disposed of it a wooded area in New Jersey.

The body of 46-year-old Marc Rubin was found in the Pine Barrens in December 2008. Prosecutors said it had been left in his apartment for more than a week before it was dumped.

Twenty-three-year-old Christina Rubin and 21-year-old Jeffrey Leinheiser of Jenkintown pleaded guilty to an open charge of murder, leaving a judge to determine their degree of guilt, and to conspiracy to murder and abuse of corpse.

Defense lawyers allege that the victim subjected his daughter to years of physical, sexual and mental abuse, but prosecutor Kevin Steele says investigators have found no evidence of abuse.