John Leonard MacKean, 64, is on trial in Nova Scotia Supreme Court in Bridgewater, charged with sexual assault and communicating for the purpose of obtaining sexual services from a person under 18.
He has pleaded not guilty.
On Wednesday the court watched a four-hour police interview, in which MacKean admitted he touched and felt the boy, but denied knowing he was underage.
Prosecutor Lloyd Tancock says it was valuable evidence.
The youth testified earlier this week he had been abducted by two other men and kept in the cabin 130 kilometres southwest of Halifax.
The 17-year-old — who was 16 at the time the offences are alleged to have taken place — also said he had been bound to a bed by chains and forced to wear a black sleeping mask when a third man was brought to the cabin on Sept. 20, 2012.
He said he never saw the third man.
MacKean was charged after the teen told police he was kept at a house in Upper Chelsea, Lunenburg County, for eight days in September 2012 before he managed to escape. He said he walked more than a kilometre to a home, where he sought help.