One of the boys on trial in Dublin for allegedly murdering Ana Kriegel was "set up" by the other boy accused of her murder, a jury has been told.
In his closing speech, Damien Colgan SC, who represents Boy B, said the case against his client does not add up "in any shape or form".
He also told jurors at the Criminal Courts of Justice that there is no evidence to convict the accused of murder. Ana's naked body was found in a derelict house in Lucan, Co Dublin, days after she went missing in May last year. Two 14-year-old boys, who cannot be identified due to their age, are standing trial accused of her murder.
Boy A has pleaded not guilty to murder and sexual assault "involving serious violence" of the schoolgirl.
Boy B has pleaded not guilty to murder.
Mr Colgan told the court that Boy B said to a friend that Boy A had "snaked him and gone behind his back to set him up".
"And that's exactly what happened. (Boy B) was set up by the accused," Mr Colgan added.
The prosecution claims that Boy B lured the schoolgirl from her home to meet Boy A because she was "interested in him".
"This case does not add up in any shape or form," Mr Colgan added. He said the prosecution is relying on lies told by Boy B during gardai interviews.
He claimed that Boy B was afraid of Boy A, and added that the child saw something that "no 13-year-old" should see.
"You have two different versions of who he is," he added.
"You have members of the gardai telling you that he is bright and clever, articulate, perhaps one of the brightest.
"His father tells you he was a 13-year-old who likes Transformers and collecting Pokemon cards and watching cartoons and hanging around with his sister rather than older brother.
"He was a child who he thought he knew what friends were.
"What person in their right mind would go to someone's house, a house where he is known, and is then seen crossing the park knowing that this girl will be dead in 25 minutes."
The defence lawyer representing Boy A said there was no evidence he intended to kill Ana.
Patrick Gageby SC told the jurors that the case against his client was almost "entirely on circumstantial evidence".
He told the jury to be cautious about evidence from Boy A's phone which showed a video of torture methods: "Is there any 13-year-old whose media would sustain prolonged scrutiny? I would suggest there is not."
"The two witnesses who heard him say he wanted to kill someone, it was a figure of speech.
"No-one gave evidence that he wanted to kill Anastasia."
"It's hard to identify any motive, any motive to kill at all," he added. "Perhaps that's why prosecution and investigators were so keen on these unusual aspects, a couple o f bits and pieces from the internet and bits from the phone and homework, to make something more meaningful about it."