A man remains in garda custody in connection with the fatal knife attack on the brother of missing Dublin teenager Amy Fitzpatrick.
23 year old Dean Fitzpatrick died on Saturday night, after he was stabbed several times at an apartment on the Malahide Road shortly before half past eleven.
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Gardaí say an altercation had taken place between the victim and a person known to him prior to the knife attack.
The victim is the brother of Amy Fitzpatrick, the 15-year-old girl who went missing in Spain in 2008.
Gardaí have appointed a liaison officer to help the Fitzpatrick family.
