New details in the murder of eight-year old Leiby Kletzky suggest the boy might have put up a fight against his attacker moments before his death.

Based on marks on the defendant it appears that there was some sort of struggle, said NYPD Commissioner Raymond Kelly.

Police still have no evidence as to whether Kletzky was molested before he was killed.

Levi Aron, 35, was arraigned in a New York court on charges of murder and kidnapping in the first degree on Thursday.

On Wednesday, body parts of Kletzky were discovered in both the refrigerator of Aron and in a dumpster about 2 miles away from Aron's residence.

The boy's feet, along with a bloody cutting board and blood stains, were found in the refrigerator. Meanwhile, other parts of his body were in a suitcase in the dumpster, reported NY Daily News.

Kletzky went missing on Monday afternoon. He was on his way home, walking by himself from summer camp for the first time, and got lost. He then approached Aron, who had just made a payment to a dental office nearby, to ask for directions to meet his parents at an agreed location.

Aron convinced the boy to get in his 1990 Honda Accord, took the boy to his attic apartment, and ultimately killed him.

After the boy went missing on Monday, Aron was soon identified through the aid of a surveillance camera tape. When the police tracked him down and busted through his apartment on Wednesday, Aron confessed to the murder.

He directed the police to the boy's remains in the refrigerator and then pointed them to the dump. He explained that he killed the boy because he panicked when he found out that the police were searching for the boy.

Aside from the police, the entire tightly-knit Orthodox Jewish Community in Brooklyn, to which the boy's family belonged, conducted an extensive search for him.

In his confession to police, Aron said: He fought back a little. Afterwards, I panicked because I didn't know what to do with the body.

The brutality of the murder has shocked many, even veteran police officers.

It defies all logic, and I think that is what makes it so terribly disturbing. To be killed in this manner is just heartbreaking. It is baffling, Commissioner Kelly said.

In court on Thursday, Aron reportedly showed no emotion as he entered the courtroom handcuffed, and entered a not guilty plea. Aron was to undergo a psychological evaluation after his lawyer told a judge that his client might be mentally ill.

He has indicated to me that he hears voices and has had some hallucinations, defense attorney Pierre Bazile said.

Aron's next court date is July 28. And Kings County District Attorney Charles J. Hynes said he would ask a grand jury for the maximum charges permitted by law for the vicious and callous murder and dismemberment of 8-year-old Leiby Kletzky.

Kletzky was laid to rest on Wednesday evening in front of over 8,000 mourners who came to show the boy their last respects.