Man accused of murders of Marion Graham and Kathy Dinsmore in court
Recep Cetin, who is accused of murdering two women from County Down in Turkey last year, has appeared in court.
He answered questions from lawyers in a brief hearing in the city of Izmir.
Mr Cetin is suspected of killing Marion Graham and Kathy Dinsmore in August.
Prosecuting lawyer Baris Kaska has said he is trying to establish if the accused's father was an accomplice in the murders.
Mr Cetin's father has previously been questioned in connection with the murders.
"These murders have not been committed by himself, it's impossible, nearly impossible," Mr Kaska said.
"These murders were not just done by the recipient. We are trying to prove that.
"There was participation by his father or someone else, so we are trying to prove that."
Mr Cetin was the boyfriend of Shannon Graham, Marion Graham's 15-year-old daughter.
Marion Graham and Kathy Dinsmore, both in their 50s, were stabbed to death in a wood near the city of Izmir.
The friends were on holiday in Kusadasi, about 100km from Izmir.
Shannon was on a boat trip when the killings happened. She alerted police when she arrived home and could not get in touch with her mother.