Poison has been one of the most popular methods of murder for centuries. When one person in a relationship decides that murder is the best way out, poison is obviously more discrete than a violent killing. Murder by poison can go undetected if it's done perfectly, but killers often make mistakes and can let slip some poisoning warning signs.

These stories of murder and attempted murder came with some big clues that poison was the culprit. So is your boyfriend poisoning you? Is your girlfriend poisoning you? Anything's a possibility. Even if you're married you might not be safe. If you're looking for signs your spouse is secretly poisoning you, read on for some of the major warning signs.