The court heard that all of them had been drinking at a house party the night before.
After the attack they returned to the house party.
It was then alleged that they took off their blood stained clothes, and another friend Artur Woszcxyna, then drove to St Bees and threw a bag with the clothes and shoes over a cliff.
Another man, Artur Skoczen is also accused of helping cover up the murder.
All the defendants deny the charges.
The trial is expected to take up to six weeks.
More top news
Andrew Lapping is heading a consortium investing over £1m in CUFC. Here's our profile on the man behind the money.
Windy and colder. Rain or showers - some of which will be wintry on hills with some snow settling over highest ground. Some sunshine around
The Carlisle United Trust has voted overwhelmingly in favour of proposals to bring a £1.26 million investment to the club.