There are many cases of zoophilia and the law, so only the most notable are related here.
"Freddie the Dolphin" (1991, UK) - man accused of masturbating a well known tame dolphin at sea. Charged with a "lewd act". Acquitted. Expert witnesses testified male dolphins use their erections not just sexually, but socially as well, and no sexual inference could be drawn. Judge summing up said of the £30,000 trial cost, "this has been the most expensive lesson in dolphin sociology that he has ever heard of". [14](dead link)
Kenneth Pinyan (2005, USA) - man died following anal penetration by a stallion. Police determined that no cruelty took place. Nonetheless, moral panic led to rapid introduction of laws in the state involved and a search for grounds to charge someone videotaping the incident with at least an offence of some kind.[28]
Sudan (February 2006) - man caught having sex with a neighbour's goat, is ordered by the council of elders to pay the neighbour a dowry of 15,000 Sudanese dinars ($50) and marry the animal. [15]
Cambodia (2005) - man caught having a "passionate embrace" in bed with dog, by wife, confessed he loved the dog more and they separated. Cambodian police commented: "As police, we could only solve the problem of his wife then wanting a divorce. We cannot solve the problem of his relationship with his dog, because under Cambodian law it is not strictly illegal... It is amazing, but this husband is not crazy. It seems he is a passionate human being who looked at a dog, and the more he looked, the more passionate he became." [16]
Wisconsin, USA (2007) - Bryan James Hathaway was convicted for having sex with a dead deer. The court case raised some interesting legal issues because the statute prohibits sex with animals, but not carcasses. The defence raised the issue that if a dead animal was an animal, at what point would it cease to be an animal. [17]