Patrick Walker has told ITV News Central that he feels 'sick' at the thought of returning to the island of Crete for the trial of his son.
Luke Walker, from the Black Country, is accused of killing his girlfriend Chelsea Hyndman in May 2010.
Luke spent two and a half years in a Greek jail but was bailed in October 2012.
His father says the costly trial has left the family in debt.
The man on trial for the death of his girlfriend on the Greek island of Crete is now back in the UK on bail, he said will clear his name.
Luke Walker arrives back home in the Midlands for the first time since being arrested on suspicion of murdering his girlfriend in Greece.