Death by Drowning: A Miss Marple Short Story

A young girl finds out she’s pregnant. They say she threw herself off a bridge. Suicide? Miss Marple is not so sure. She goes to her friend Sir Henry Clithering, former head of Scotland Yard, and convinces him to get involved. He notes that he generally wouldn't interfere with current matters but, since it's Miss Marple and he has experienced her talents previously, he agrees.