A Spanish prison screened a short film made by inmates Friday with one missing ingredient -- a key actor in the jail-house drama is on the run. Inmates spent months making "Guilty", about a murderer haunted by his victim, to show in an annual festival behind bars in Leon, northern Spain, a prison official and media here said. "Among the inmates taking part, there was one in the final stages of his sentence who was allowed out regularly with leave, but who did not come back from one of those leaves," said a prison service spokeswoman. Prisoners completed the film without the missing actor who disappeared at least two months ago, said the spokeswoman for the Secretary General of Penitentiary Institutions. She denied reports he had the leading role. "He may have had some more important scenes but he was not not necessarily the hero." The actor is being sought for breach of a six-year drug-dealing sentence, which had been due for completion in 2012, she said, stressing that he was not considered a danger.