A costume for a detective character in the past typically includes a trench coat, a fedora hat, a white dress shirt, slacks or trousers, dress shoes, and a necktie. You can also add a pipe, a magnifying glass, and a notebook to complete the look. Accessorizing with a toy gun and a revolver can also add to the authenticity of the costume. It's essential to note that historical accuracy is also an important consideration when creating a costume for a detective from a specific period in the past.
