The enforcer for Oregon’s grocery industry made enemies. One tried to kill him with thallium.

Conservationists saw the 6-year-old brown bear as a symbol of hope. Villagers saw him as a menace. Then he turned up dead.

A romance author accused her husband of poisoning her. Was it her wildest fiction yet?

A new wife, a dead husband, and the arsenic panic that shook the Victorian world.

The hit on Sergei Skripal.