Updated

Jurors in Boston deliberated for a fourth day without reaching a verdict in the parental kidnapping trial of the man who calls himself Clark Rockefeller.

The jurors got the case Monday and will resume deliberations Friday.

They had asked a judge Wednesday if prosecutors had to prove that Rockefeller — whose real name is Christian Karl Gerhartsreiter — knew what he was doing was criminal or morally wrong. The judge told the panel the prosecution must prove both.

Click here for photos.

Defense lawyers say Gerhartsreiter was delusional and legally insane when he fled to Baltimore with his 7-year-old daughter during a supervised visit.

Prosecutors call his insanity claim "preposterous" and say he is a con man who planned the kidnapping for months.

• Partial List of Witnesses at the 'Clark Rockefeller' Trial

Click here to read more on this story from MyFOXBoston.com.