On this day in 1892, Andrew and Abby Borden were murdered in their own home--apparently hacked to death by an axe. After a couple of days of investigation, police came to suspect one of the Bordens' two daughters, Lizzie, of committing the act.
Lizzie Borden, of course, has become a popular figure in American murder lore; songs and poems were written about her and the brutal murders attributed to her.
However, after a trial in which the prosecution could put forth nothing but circumstantial evidence, Lizzie Borden was aquitted of her parents' murders, and she went back to her home town with her sister. She lived in a handsome estate there until her death in 1927.
It was never determined who actually killed Andrew and Abby Borden; the evidence in fact still points to Lizzie. She was acquitted, however, because the prosecution had not been able to establish guilt beyond a reasonable doubt.
A list of all the circumstantial evidence of Lizzie Borden can be seen here.
Photo link here.