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A man was left "covered in blood" after his alleged attacker whipped out a knife and began "swinging it with no fear" in a park, a court has heard. Georgie Tannetta, 20,

is accused of stabbing James Brogan, 43, in the arm, leaving him bleeding heavily at a park in Cardiff on November 12 last year. The alleged victim suffered multiple organ failure as a

result of a cardiac arrest and died in hospital the following morning. Tannetta, of Rhodfa Crughywel, Trowbridge, denies murder, manslaughter and possession of a bladed article. _F_ _or the

latest court reports sign up to our crime newsletter_. A trial at Newport Crown Court on Wednesday heard from a 17-year-old boy who witnessed the incident and was asked to describe what he

saw. In a police interview with the boy played to court he said: “I went to work, I’ve come home, I don’t go out normally because I’m busy training and stuff. Went to a boy’s house, all the

boys were there, we walked to the Train Park where it all happened and we saw the suspect stab James Brogan. "As soon as it happened I stood there, watched because I was shocked, and

rode off.” He added: “He’s come over to all the boys, the person who did it, I was behind them so I don’t know what he said to the boys. He’s come over, he’s started to walk over to Chicken

Lane where James Brogan was standing with a can of Stella speaking to someone. "He came over with the knife behind his coat, he’s pulled it out and he’s swinging it with no fear.” When

asked to name the person, the teenager said: “Georgie Tannetta.” The 17-year-old said: “I seen him go over there and stab him. It was going on a good 30 seconds to a minute. He kept swinging

it and as he’s run off, as he’s swinging it he dropped the knife and picked it back up and kept going. “As he was swinging it James Brogan shouted ‘Tannetta’. He ran over to them and asked

them if they wanted to chill and they said no. We rode off on our bikes.” The witnessed added that he believed Mr Brogan was stabbed numerous times but later heard he was stabbed once in the

arm. He said: "The blood was pouring out of him, the Stella was still in his hand when he was getting stabbed and I thought he was spilling his Stella but it was blood popping out of

him. “Once (Tannetta) dropped (the knife) he got angrier and stabbed him a few more times. He was screaming but he was screaming so loud you couldn’t understand what he was saying. “(James)

was trying to fight back. I think one time he tried swinging a punch and then he tried holding on to him. All I heard him say was ‘It’s Tannetta’. He was screaming it. There was a lot of

blood, it was all up the road and all up his side, he had a white t-shirt on and it was all covered.” The trial previously heard police were called at 4pm to a recreation ground near

Coleford Road, St Mellons, which was known locally as the Train Park. Mr Brogan had been stabbed and had collapsed while bleeding heavily. He was treated by paramedics at the scene and on

route to University Hospital of Wales in Cardiff, and at the intensive care unit at that hospital. However, despite the best efforts of medical staff he died as a consequence of his

injuries. Tannetta was later found hiding in the attic of his aunt's home in Cardiff and was arrested on suspicion of murder. He later told officers had been assaulted by Mr Brogan two

days before his death. He said he was walking alone through the park on November 12 when he heard a noise behind him and saw Mr Brogan coming towards him with something in his hand. Tannetta

said he was frightened and asked a group of youths nearby for something to defend himself. He said he was passed a knife by one of the group and claimed Mr Brogan tried to hit him with the

object in his hand. The defendant said he hit out with the knife to defend himself in the hope Mr Brogan would leave him alone. Tannetta said he ran away when he saw Mr Brogan was bleeding

and gave the knife back to the group of youths. He denied intending to cause serious harm or kill Mr Brogan and was “acting with reasonable self defence”. The prosecution say that by

repeatedly trying to stab Mr Brogan the defendant is guilty of murder and was "evidently still aggrieved by that incident in which he threatened to stab Mr Brogan when he saw him next,

which he did." The trial, estimated to last two weeks, continues. FOLLOW BELOW FOR LIVE UPDATES: