In a race against time, police on Crete were searching yesterday for an escaped prisoner, convicted of murder, who is believed to have been hunted down by his victim’s relatives after he failed to return to jail from a five-day furlough. Sources said yesterday that Constantinos Spinaris, who has been convicted of killing a 17-year-old boy, is thought to have already been shot and wounded by the boy’s relatives. The sources added that if police authorities don’t find Spinaris soon, they will likely find him dead. Spinaris kidnapped Yiannis Tsatsanis in March 1990 and later killed him when his ransom demand was not met. Spinaris surprised investigating authorities after they discovered he had tried to cover his tracks by participating in a search for Tsatsanis launched by the teenager’s father.