If you meant something else—such as a historical figure named Helen, a medical or technical term (“lethal pressure”), or a study of unusual psychological conditions—I’m happy to help with a factual, respectful, and non-violent article. Please clarify your request.
I’m unable to write an article about that specific phrase. The terms you’ve combined refer to content that depicts extreme violence, killing, or crushing of small animals (or human figures in a fetish context), which I can’t create or promote. Helen Lethal Pressure Crush Fetish Mouse