Gardaí will next week press for charges to be brought against a 16-year-old boy in connection with the murder of German student Thomas Heinrich last weekend.
A detailed Garda file is set to be completed within days and sent to the DPP recommending that serious charges be brought against the juvenile.
Gardaí expect the DPP will direct charges based on CCTV footage and other evidence gathered in the case.
They also hope to have the results of forensic tests on knives and bloody clothing that were found near the scene before they send the file, which they believe will copper-fasten their case.
“We are putting a file together and are hoping to bring very serious charges,” said one Garda source.
“We hope to send a file next week and expect a quick turnaround.”
The Garda investigation team has made substantial progress since Mr Heinrich was stabbed to death outside his apartment complex in Rialto, in Dublin’s south inner city, early last Saturday.
The 22-year-old was having a smoke with a German friend, Robert Rinker, also 22, on his balcony at the Herberton complex when three passing local youths abused them from below and threw a beer can at them.
The two German students went down to the youths and a verbal argument flared.
The youths left, but two of them, aged 16 and 19, later returned after arming themselves with knives. They began abusing the Germans again.
They left the complex to confront the youths, during which Mr Heinrich was fatally stabbed and Mr Rinker suffered slash wounds to his face and hands.
Both Germans were postgraduate students and studying international media management at the nearby Griffith College.
Local Garda knowledge and follow-on searches led to the discovery of three knives in the area and the discovery of blood-stained clothes in a nearby skip.
Forensic tests are being conducted on these to see if they can be linked to either of the two youths arrested.
The mother of the 16-year-old has also been questioned.
The third youth, also 19, who did not return was also arrested. This individual is a suspect for a bottle attack on US tourists on the quays earlier this year.
Garda sources said they probably could have got the DPP to okay charges against the main suspect if he was an adult. Given that he was a juvenile, detectives had to prepare a detailed file for the DPP.
Garda sources said the 16-year-old was known to them but not in relation to any serious crime.
The stabbing has deeply affected German students in Griffith College as well as students in general living in Herberton, which is popular with those attending Griffith College and DIT.
The Herberton apartments replaced the notorious Fatima Mansions flats complex, which was knocked down and replaced by modern apartments housing local authority and private tenants.
* Gardaí are trying to track down the flatmate of a Dutch man who was found stabbed to death at his Dublin apartment on Wednesday.
The victim, aged in his mid-30s, has not yet been identified. He was found in his bathroom in the Linnbhla complex in Ballymun with a kitchen knife in his chest.
Gardaí suspect the body may have been there since last Friday.
It is understood the alarm was raised by the landlord after the rent was not paid. The letting agent had to break into the apartment after repeated attempts to contact him by phone failed.
The agent rang 999 and gardaí sealed off the scene. They gathered some details on his identity there. This, along with a photograph, was supplied to the Dutch police. It is thought he is of Moroccan extraction, with various names, and that this has caused difficulty establishing his identity.
His flatmate is also thought to be of Moroccan extraction.
Meanwhile, detectives investigating the gangland murder of crime “godfather” Eamon Kelly in Killester, north Dublin, on Tuesday have further extended the detention of a Real IRA figure.
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