An elderly man was recently the victim of a fatal stabbing in Darwin - prompting outrage and concern from residents.

Northern Territory Police have arrested the 18-year-old suspect over the death of  Linford Feick, 71, who ran the Friendly Grocer store in Nightcliff in the region's north.

Australian correspondent Murray Olds says the 18-year-old had only just been granted bail for sexual assault charges - and shouldn't have been out.

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