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
Over a hundred youngsters in Coniston were let out of lessons today to join their school's long tradition of an annual fell race.
A campaign has been launched to push for the restoration of the historic Union Chain Bridge.
Rain overnight. Brighter but cooler Friday. Windy weekend