Dino Donaldson, 22, murdered Anojan Gnaneswaran, 21, at a railway station in south-west London in January 2024.
Irish premier Micheál Martin has expressed confidence that two major political summits being hosted in Dublin next week will pass off safely.
The 82-year-old, who was arrested after the FBI searched storage units he rented, faces at least 20 years in prison if convicted.
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