It's long been assumed that it was a suicide, however, because he was frustrated and overwhelmed by the chemical castration that the British government forced upon him after he admitted to having a sexual relationship with a man which was against the law at the time. Some have since speculated that Turning's death by Apple wasn't necessarily intentional. He was known to be careless with experiments and accidentally inhaling cyanide, or placing an apple in a cyanide puddle. That wouldn't have been outside the realm of possibilities with Turning