Six miles off the coast of New Hampshire, but actually belonging to the state of Maine, Smuttynose Island is one of the Isles of Shoals. Named by fishermen who thought all of the seaweed that surrounding the island looked like, upon approach, the "smutty nose" of a giant sea creature, Smuttynose Island is best known not for its name but for two gruesome murders that occurred there in 1873.
On March 6, 1873, two Norwegian women were strangled on the island. One was struck by a hatchet. A third woman was able to escape and hid from the attacker on a part of the island now named after her. The only witness to the murders, the third woman, Maren Hontvet, was able to identify a German fisherman as the killer. Louis Wagner was tried, convicted, and hanged - but he maintained his innocence throughout the process.
Wagner was hunted down and found in Boston after fleeing the island. Ten thousand angry townspeople were waiting for him at the train station on his way to the Portsmouth Police Station. The mob followed Wagner to the station, shouting "Lynch him, kill him!" all the way. Despite this, though, there were several who believed Wagner was innocent, even after he escaped from his jail cell and had to be brought back.
The story was immortalized in an 1875 story in The Atlantic by Celia Thaxter, "A Memorable Murder."