After 42 years of the incident, a 66-year-old former British soldier, part of the 1st Battalion, Parachute Regiment, also known as "1 Para" was arrested by detectives on Tuesday in connection with the 1972 Bogside massacre, according to BBC.
It is reportedly the first arrest that has been made in connection with the random shooting on 30 January 1972 in the Bogside area of Derry, Northern Ireland, where British soldiers opened fire on unarmed civilians.
Bloody Sunday – sometimes called the Bogside Massacre - is one of the most embarrasing chapters in the history of the British army.
A total of 26 unarmed civilians, part of a protest march were shot by the British soldiers. A total of 14 people were killed in the massacre. Later investigations found that many of those killed were either fleeing from the soldiers, while others were shot trying to help the wounded.
In 2010, British Prime Minister David Cameron made a public apology after an enquriry commmision - the Saville Report - heavily criticised the Army and said that it was the soldiers who had fired the first shot.
Speaking in the House of Commons, Cameron had said: "Mr Speaker, I am deeply patriotic. I never want to believe anything bad about our country. I never want to call into question the behaviour of our soldiers and our army, who I believe to be the finest in the world."
"And I have seen for myself the very difficult and dangerous circumstances in which we ask our soldiers to serve. But the conclusions of this report are absolutely clear. There is no doubt, there is nothing equivocal, there are no ambiguities. What happened on Bloody Sunday was both unjustified and unjustifiable. It was wrong," he said.