64 year old John Leonard MacKean is facing two charges in relation to his alleged role in the incident which took place in September 2012.
The alleged victim - a teenage boy - was the first witness to take the stand in Nova Scotia Supreme Court in Bridgewater.
He told court he was blindfolded and chained to a bed while he was sexually assaulted by David Leblanc and Wayne Cunningham.
The teenager also testified about a third man involved in the sexual acts.
However, the boy was blindfolded and could not clearly identify the other individual.
Evidence of chains, a blanket from the bed and a blindfold were submitted as evidence by the Crown prosecutor.
Defence lawyer Mike Taylor will cross examine the alleged victim this afternoon.
The trial is being heard before a judge and 12 member jury.
The trial is expected to last three days.
