Prosecutors and a lawyer for the man who calls himself Clark Rockefeller failed Tuesday to reach an agreement for him to plead guilty to kidnapping his 7-year-old daughter.

The two sides met before Suffolk Superior Court Judge Carol Ball for around an hour Tuesday but could not reach terms on any possible deal, said Jeffrey Denner, attorney for Rockefeller, whose real name is Christian Karl Gerhartsreiter.

"The defendant has his interests. The state has (its) interests," said Denner. "We just couldn't come together."

Denner declined to give specifics on why the two sides remain far apart on any deal but said his client knows he may have to serve time. "He understands he's made some mistakes that he has to pay for," Denner said.

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Assistant District Attorney David Deakin declined to comment.

Both sides have until Feb. 11 at 3 p.m. to reach an agreement or the case will go to trial tentatively scheduled to begin March 23.

Before Tuesday's proceedings, Denner had said he was talking to prosecutors about a possible guilty plea.

Gerhartsreiter is charged with snatching his daughter, Reigh Boss, off a Boston street during a supervised visit last summer. He was captured in Baltimore six days later, and his daughter was found unharmed.

After his arrest, authorities discovered that Rockefeller was using a false name and is really a German national who has lived under fake identities since moving to the United States in the late 1970s.

California authorities have labeled Gerhartsreiter a "person of interest" in the 1985 disappearance of a San Marino couple, Jonathan and Linda Sohus. Authorities say he rented a guest house on the couple's property.

Gerhartsreiter is charged with parental kidnapping, assault and battery, assault and battery with a dangerous weapon, a car, and giving a false name to police. Authorities said he shoved a social worker who was supervising the father-daughter visit and jumped into a waiting car. The social worker received minor injuries when he tried to grab onto the car and fell to the ground.

Last month, prosecutors said they would recommend a sentence of 4 1/2 years to 5 years if Gerhartsreiter pleaded guilty. Denner would not say what he will recommend for a sentence.

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