Dennis Nilsen, a British serial killer uses expressions like "good grief"

...Jay immediately smelled rotting flesh. Nilsen queried why the police would be interested in his drains, so the officer told him they were filled with human remains. "Good grief, how awful!" exclaimed Nilsen. "Don't mess about, where's the rest of the body?" replied Jay. Nilsen responded calmly, admitting that they were in two plastic bags in his wardrobe.