‘I held Charlie’s hand and told him, you’re going to be an uncle’: Brother of murdered Charlie Cosser, 17, reveals what he told stabbed teenager moments before his life-support machine was turned off

The brother of a murdered teenager has revealed he told him he was going to be an uncle just before his life support was switched off.

Charlie Cosser, 17, was stabbed three times in the chest at an end-of-term summer party at a £1.5 million estate in Warnham, West Sussex, after a fight broke out.

The teenager was found sitting on a pallet about ten to twenty minutes later, complaining that his ‘chest and back really hurt’, and was rushed to hospital.

However, along the way he suffered cardiac arrest after a cut in his aorta caused internal bleeding, and he tragically died two days later.

Last week, a 17-year-old boy was convicted of murdering… Brighton Crown Court and showed no emotion as the verdict was read out.

Charlie Cosser (pictured), 17, was stabbed three times in the chest during an end-of-term summer party at a £1.5million estate in Warnham, West Sussex, after a fight broke out

Charlie’s father Martin pictured with mother Tara. Martin said: ‘What is very difficult for all of us is the fact that when Charlie was attacked and went through those incredibly terrible moments, he didn’t have a close friend with him – we haven’t even been able to grieve for Charlie.’

Police pictured at the scene of Charlie’s murder. The teenager was found about ten to twenty minutes later sitting on a pallet complaining that his ‘chest and back really hurt’ and was rushed to hospital.

Now Charlie’s older brother Adam has detailed his final moments with his sibling, saying he broke the news to him that he and fiancée Jade Avery were expecting a child.

Adam had hoped to tell Charlie at a family celebration a few weeks later, but instead he had to make the revelation while his brother lay in a hospital bed.

He told The times that he and Mrs. Avery had leaned over the victim and whispered the news in his ear.

Adam, 28, said: ‘We think Charlie knew, but the fact that we don’t necessarily know hurts us a lot.’

The couple’s son, Albie Charlie Michael Cosser, was born earlier this year and is now three and a half months old.

The heartbroken brother, who works as a football development manager, explained he couldn’t help but be reminded of another time he visited his sibling in hospital – the day he was born.

Charlie went on to become a talented footballer who emerged at Brentford’s academy and once scored eight goals in a ten-minute match at the age of seven – much to his brother’s delight.

The 17-year-old had planned to go on his first ‘lads’ holiday to Zante the week he died and attended the party at a field in West Sussex on July 23, despite only knowing two people there.

Charlie pictured with his older brother Adam. The heartbroken brother has detailed his final moments with his sibling, saying he broke the news to him that he and fiancée Jade Avery were expecting a child

Charlie’s (pictured) parents showed up every day of the three-week trial, along with Adam and the teen’s sister Eloise, 16

Charlie’s father (pictured, centre, in black), who quit his job as an insurance broker to start knife awareness charity Charlie’s Promise, said parents had told him his videos had moved their children to tears

Video footage played in court showed Charlie being stabbed as Britney Spears’ Toxic erupted at the event after a fight broke out as a girl complained about the killer’s behavior towards her.

No one noticed what had happened and then friend Wiktor Mlynarski, 22, found the victim shortly after he thought he had spilled cider on him because he was ‘covered in red’.

Charlie then revealed his stab wounds to Mr Mlynarski, who had only known the boy for a few months.

His father Martin said this information was difficult for the family to swallow and had only come to light because the killer withdrew his initial guilty plea months later.

He said: ‘What’s very difficult for all of us is the fact that when Charlie was attacked and went through those incredibly terrible moments, he didn’t have a close friend with him – we haven’t even been able to mourn Charlie.’

He and Charlie’s mother, Tara, from Milford, Surrey, visited every day of the three-week trial, along with Adam and the teenager’s sister, Eloise, 16.

They were often accompanied by Jade, who was carrying baby Albie, and a group of family friends and wider family.

The killer, who gave no evidence, burned his clothes in a fire pit at a friend’s house and went to lunch with his parents the day after the murder.

Charlie had recently started as an apprentice groundsman at Charterhouse private school in Surrey and dreamed of becoming a ground staff at Chelsea Football Club.

Adam said Albie often reminds him of his brother when he was young and they shared the same cheeky smile, which gave Charlie his nickname Cheeks.

He added that showing his uncle’s baby photos sometimes calmed him down.

The devastated brother described the killer as ‘pure evil’ and argued no punishment would be enough.

Mr Cosser pictured with Chancellor Jeremy Hunt (right) at the Milford Summer Festival on June 8

The heartbroken brother (pictured, second from right, with Mrs. Cosser, right, Mr. Cosser, left, and sister Eloise, second from left) explained that he couldn’t help but be reminded of another time he saw his brother or sister in the hospital – the day he was born

Video footage played in court showed Charlie being stabbed as Britney Spears’ Toxic darted outside the event after a fight broke out as a girl complained about the killer’s behavior towards her

Charlie’s father, who quit his job as an insurance broker to set up the knife awareness charity Charlie’s Promise, said parents had told him his videos had moved their children to tears.

He added that no words could express how much he loved his son, but if the charity could help prevent even one child from being stabbed, its mission would be accomplished.

“I still open Charlie’s bedroom door to see if he’s there,” he said. ‘I still have those moments when you’re driving around in a car and you suddenly burst into tears, it just hits you, you have those flashback moments.’