Dorothea Helen Puente

Dorothea Helen Puente was an American serial killer. In the 1980s, Puente ran a boarding house in Sacramento and murdered elderly and mentally disabled boarders before cashing their Social Security checks. Her toll reached nine confirmed murders, with six unconfirmed.

The serial killer, dubbed the "Death House Landlady," was charged with the murders of nine people but she was convicted of only three of them in 1993: A jury could not decide on the other six deaths. she died in prison in 2011 at the age of 82. She maintained that all the boarders died of natural causes. The remains of seven tenants were eventually found in her backyard.