One of two boys accused of the murder of Ana Kriégel, told a friend he believed his co-accused was trying to set him up, the Central Criminal Court has heard.
Five young teenagers gave evidence via videolink to the trial this morning.
The two accused 14-year-old boys, deny murdering the schoolgirl in a derelict house in Lucan on 14 May last year.
The first accused boy also denies aggravated sexual assault.
A 14-year-old boy told the court he had spent some time with the second accused boy around a month after Ana Kriégel's body was found.
He said he asked Boy B what he thought about "the whole Ana thing".
The witness said Boy B told him he had to tell him something, but not to tell anyone else.
Boy B told him he and Ana met Boy A at the abandoned house on the evening she went missing.
Boy B saw Boy A and Ana get into a semi physical argument which got more violent as time went on. Boy B said Boy A got Ana into a headlock and then tried to get her to the ground.
Boy B said Ana was fighting back - trying to push Boy A off, kicking and punching him in the arm and leg. Boy B told his friend that he "freaked out" and ran away.
Under cross examination by defence counsel, Damien Colgan, the witness agreed that he had told gardaí that he had an earlier conversation with Boy B on the same day.
In that conversation Boy B told the other boy that he believed Boy A was "snaking him".
He explained this meant Boy B believed Boy A was "building a case against him" that he was acting like a snake in the grass, and going behind his back.
The witness said Boy B felt his co-accused had set him up because he "made him call for Ana".
He agreed he had not told gardaí this until 22 November, after discussions the matter with his own parents. He said he had not really thought about it too much.
The witness also told the court that he remembered Boy A saying "I'll kill you", but it was a common, jokey thing that he and others would have said, if for example someone played a trick on them.
Another boy told the court Boy A did not seem himself when he saw him a day or two after Ana went missing.
The witness said Boy A was a bit agitated and fidgety.
He said he also saw Boy B and he was "just fine". He said he was "like he always was, calm and collected."
The court heard from a 15-year-old boy who said he "vaguely" remembered being approached by the accused boys about joining a "satanic pledge".
This witness said Boy A and Boy B approached him some time at the beginning of 2018 and wanted him to sign the pledge.
He told the court the boys said it was a "satanic pledge" but they themselves said it was not serious. He said they were trying to see how many signatures they could get as a challenge.
He signed it he said, to help them see how many they could get.
He said they talked and joked about it for maybe another two or three days, but then they forgot about it. He agreed under cross examination that he thought of it as a "joke or a mess".
Another boy, said Boy B had walked up to him and asked "nonchalantly" if he wanted to be part of his club. Boy B told him the rules were "can't talk about God and share homework".
The boy told the court that all he processed was the homework part and he said ok.
He said it was never mentioned again. He said there might have been a mention that you were only allowed talk about Satan.
He said he considered Boy B to be the leader as he asked him to join. But he said when he said yes, that was the end of it. He said the boys shared homework occasionally anyway, so the club did not really make an impact on his life.
The next day he said, it was as if it never happened.
A 14-year-old girl gave evidence that Ana had asked her to ask Boy A if he liked her. She said she did not know if Ana had ever told Boy A directly that she liked him.
She said she had asked Boy A but could not remember what exactly was said.
She told the court she did not think he liked Ana. She said she believed this happened in around September 2017.
The court also heard from a witness who works for a company who are the sole distributors of a type of tape used by building contractors.
Adrian Crossan said the tape was designed to last and was highly adhesive. He said it was quite a specialised product and would be ordered for a specific purpose.
Dr Orla Dempsey, an analyst with An Garda Síochána, gave evidence about receiving phone records relating to Ana Kriégel and Boy A's phone and about data from devices taken from Boy A's home.
She agreed that Ana's phone and a phone number associated with Boy A were "pinging" the same phone mast at around 5.32pm on the day she went missing. She also agreed the mast covered a large general area.
There were only two outgoing calls from Ana's phone on 14 May 2018. Both were made shortly after 4pm, to her mother. The last time it was active was at 5.32pm.
There was no call traffic on Boy A's phone that day but the data showed his phone had connected to the same mast between 5.14 and 5.36pm for data usage.
Dr Dempsey also looked at a screenshot of a list of videos, including a video entitled "15 most gruesome torture methods in history" which she agreed was saved on Boy A's phone on 14 February last year.
She said a printout of search terms, showed there was a search on Boy A's phone for "abandoned places in Lucan" on 30 January 2018.
Under cross-examination by lawyers for Boy A, she said she had not tried to replicate this search.
Mr Justice Paul McDermott told the jurors there would be some further short evidence from the prosecution on Tuesday morning, but that would bring the prosecution case to an end.
