BOSTON -- Jurors on Monday heard closing statements from prosecutors and defense attorneys in the kidnapping case of the man who calls himself Clark Rockefeller, hearing from one side that "Rockefeller" was an insanely troubled man, and from the other that he was a crafty liar who knew exactly what he was doing when he snatched his daughter off a Boston street.

Rockefeller is really Christian Karl Gerhartsreiter, a German national who lived a double life using the name of the wealthy Rockefeller oil tycoon clan for close to 20 years.

He is charged with kidnapping his then-7-year-old daughter Reigh Boss last July during a supervised custody visit in Boston. A social worker supervising the visit was injured as Gerhartsreiter fled the scene.

His attorneys are trying to convince the jury that he was insane at the time and not capable of understanding the criminal nature of his actions.

"Crazy people lie," Gerhartsreiter's defense attorney Jeffrey Denner told the jury at the conclusion of his closing arguments, saying that Gerhartsreiter was a man who for years fed a delusion that he was a rich and powerful man and then suffered a "psychotic break" when his wealthy wife, Sandra Boss, divorced him in 2007.

"Taking a look at Mr. Rockefeller, you know something is wrong with him … you don’t have to be a rocket scientist to know something is very wrong with him," Denner told the jury.

"You see him descending into madness," Denner said, recounting Rockefeller's past as a young German man who moved to the U.S. at 17 and lived with people he didn't know, marrying a woman to obtain a green card, and then hopscotching across the country until he ended up adopting the Clark Rockefeller persona.

"This is not a man playing with a whole deck ... this is a picture of someone who has serious, serious problems," Denner said.

But state prosecutor David Deakin told the jury that what they must decide is whether Gerhartsreiter had the ability to know what he was doing was wrong, and whether he was capable of conforming to the law at the time, which Deakin asserted Gerhartsreiter could and did.

"There’s no doubt he suffers from a personality disorder, but there’s no evidence to suggest that it compromises his ability to know the difference between right and wrong," Deakin told the panel.

Instead, he said, Gerhartsreiter was a controlling man who didn't want to lose the comfortable lifestyle he had established through his wealthy wife and their daughter. He wasn't suffering from a delusion, Deakin said, because he knew what he was doing was wrong and took steps to cover his tracks after he did it.

"If he didn’t understand the wrongfulness of his conduct, why would he lie about being Charles Chip Smith when he went to Baltimore?" Deakin said, reminding the jury that Gerhartsreiter took steps to ensure that the people who unwittingly helped him during the the kidnapping didn't know what he was up to.

"It's not a delusion. It's all about the money," Deakin said.

"This is not a case about madness, it's a case about manipulation," he said, summing up his closing arguments. "Don't let him get away with that. Don't let his insanity defense be the culminating manipulation in a lifetime of lies designed to try to get what he wants. Don't shy away from the facts. See the truth before you and hold the defendant criminally responsible for his actions."

Denner began by reminding the jury that the burden of proof of whether Gerhartsreiter is insane is up to the state prosecutor.

"Every defendant is presumed innocent unless and until the government and the prosecution ... proves to you beyond a reasonable doubt, every material allegation of the charges," he said.

Denner and his co-counsel Tim Bradl told the jury that the state has failed to prove the charges of assault and battery and a false name charge because, they said, government witnesses simply were not credible. They also said their witnesses, a psychiatrist and psychologist, were the more credible witnesses and both said Gerhartsreiter suffered from delusions.

The jury, composed of eight women and four men, including a Harvard law professor, got the case about 12:15 p.m. and adjourned at about 4 p.m. for the day without reaching a verdict.