Elvis Duruaku, 24, allegedly murdered fellow Liverpool student Hassan Haadi, 22, by knocking him out, then stamping on his head.
Prosecutors say Mr Haadi wanted to fight because Duruaku told Mr Haadi’s girlfriend, Simran Nijher, that he was cheating on her.
A jury heard Ms Nijher, 22, and Duruaku later exchanged laughing texts while Mr Haadi was in a coma, from which he never woke up.
Duruaku, of Barker Avenue North, Sandiacre, denies murder and manslaughter in relation to the incident in Everton, on March 21 this year.
A trial today heard evidence from Mr Haadi’s friend Jacob Ebau, who drove him and three other friends to the junction of Shaw Street and Langsdale Street, at around 8.30pm.
The 22-year-old told Liverpool Crown Court that Mr Haadi wanted to talk to Duruaku, but when they arrived “jumped” out of his car and started to fight.
He described watching on as Mr Haadi was knocked to the ground and how he saw and heard a “stomp” by Duruaku on his friend.
When shown CCTV footage by Tim Storrie, QC, prosecuting, Mr Ebau said he stayed by his car as Hassan tried to attack Duruaku.
Mr Ebau said he remembered one of his three other friends who accompanied Mr Haadi – Oliver or Olly – “trying to jump in”.
He said Mr Haadi and Duruaku were “just talking smack to each other”, adding: “They were just trash talking each other.”
Mr Ebau said shortly before his friend was knocked down, Duruaku said “who is the bitch now?” and Mr Haadi replied: “Your mum.”
He said Mr Haadi was left “motionless and stiff” and Duruaku bent down to pick something up, before he and two friends ran off towards Islington.
Mr Ebau said he considered driving his friend to hospital, but someone called an ambulance, and two student doctors tended to him.
He said he didn’t tell police what he had seen, adding: “I was still trying to rationalise what was happening myself.”
Asked why he didn’t give officers Duruaku’s name, Mr Ebau said: “I don’t know.”
He said Mr Haadi was taken to Royal Liverpool Hospital, where he and Oliver went to see him, and spoke to police again.
Mr Ebau said he told officers Mr Haadi had fallen on the back of his head because a doctor wanted to know about his head injury, then made a statement to police on April 6, the day after Mr Haadi died.
Mr Ebau said Ms Nijher “kept on ringing” him on the night of the incident.
Mr Storrie asked: “Were you keen for her to know what had occurred?”
“No,” he replied, adding: “Because I thought she had caused the situation.”
Duruaku tried to call Mr Ebau on March 25, and again “a couple of days later”, which Mr Ebau said was to ask “how Hassan was doing”.
He said he told Ms Nijher he was waiting for Mr Haadi’s father to let him know how he was and the “feds” – police – had Mr Haadi’s phone.
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Under questioning by Adam Davis, QC, defending, Mr Ebau agreed he “held Simran responsible”, because after a text exchange with her, Mr Haadi became “very angry”.
He confirmed Mr Haadi was trying to get hold of Duruaku, was then given his number by someone and rang him, but Duruaku didn’t answer, before the pair exchanged texts.
Mr Davis said Mr Ebau told jurors the purpose of driving to Duruaku’s flat was for the two men to “talk” and asked: “Why did it require five of you?”
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Mr Ebau said “I don’t know” but accepted they went as a “crew”, which he said was: “To show support for Hassan.”
Mr Davis replied: “It was a bit more than that, wasn’t it?” Mr Ebau said: “You didn’t see any of us get involved.”
The lawyer said: “You told us Olly tried to.” “Yeah,” the witness answered.
Mr Ebau said Mr Haadi didn’t say anything about fighting on the way, but agreed when they got there, “he wasn’t interested in talking”.
He accepted the two people with Duruaku never crossed the road and Duruaku was “surrounded”, with Mr Haadi in front of him and three of his friends near him.
Mr Ebau said he wouldn’t get involved, but accepted that throughout “Hassan was asking the others to get involved”.
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He agreed with Mr Davis’ suggestion that there were four or five occasions when Duruaku “dropped his hands” and looked like he was trying to talk and stop the fight.
Asked if Duruaku was trying to get Mr Haadi to go away, the witness said “I think so”, and agreed Duruaku was “keeping him at bay by jabbing”.
He said he asked them to stop and agreed the only purpose of Duruaku contacting him afterwards was to see how Mr Haadi was.
Questioned again by Mr Storrie, the witness said he couldn’t tell the jury what Oliver said to police, but he hadn’t wanted to talk to officers.
Asked why, he said: “Because I thought Hassan would wake up and say it himself.”
Mr Ebau confirmed he didn’t hear Duruaku asking Mr Haadi to go away or stop during the fight, but Mr Haadi did try to get him and his friends involved.
He added that Mr Haadi shouted out his name, just before he fell to the ground.