A former British soldier remains in custody in the North, as part of the investigation into the Bloody Sunday shootings.

The 66-year-old man was detained in Co Antrim yesterday and taken to Belfast for questioning over the deaths of three men. 

The arrest is part of a legacy inquiry into the deaths of thirteen civilians who were killed by the British Parachute Regiment during a civil rights march in Derry's Bogside in January 1972 - a fourteenth man later died of his injuries.

John Kelly's brother Michael was 17 when he was shot dead.

His brother says he was not involved in politics but went on the civil rights march because his friends were going.

The impact of his death on the family was "horrific" his brother said.

"We had to fight to clear our loved ones' names, and now we're looking at a prosecution".

He says the family received the news of yesterday's arrest with sadness and delight.

Mr Kelly told Newstalk Breakfast he is optimistic that charges will be brought, but he believes the Troubles would not have lasted for so long "only for what the parachute regiment did on that day":

Kate Nash's 19-year-old brother, William, was also among those who lost their lives:

Speaking yesterday, she said: "When the police officer first called I was absolutely staggered to be honest with you. Desperately shocked. If I could describe it to you like this, I was kind of 'uncomfortably happy'."