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
Carlisle have secured their Football League status by beating Plymouth Argyle 2-0 at Brunton Park.
Kerrie brings you Saturday night's forecast
Carlisle are preparing for game that could see them safe from relegation. They welcome Plymouth Argyle to Brunton Park for a 3pm kick-off.