Lynda Cheryle Lyon Block (February 8, 1948 – May 10, 2002) was an American woman convicted of the murder of Sgt.

[3] Her second husband, George Sibley (September 8, 1942 – August 4, 2005), claimed that a constant trait of Block was charity.

While living in Key West, she served as Secretary of the Humane Society and also as an animal abuse investigator.

[2] Before the crime that led to her conviction and transfer to Alabama's death row, Block published Liberatis, a political magazine.

A passer-by expressed concern for Block's son to Opelika Police Sergeant Roger Motley, saying it appeared to her as if the boy wanted help.

Part of an anti-government movement, Block and Sibley had renounced their citizenship and destroyed their birth certificates, driver's licenses, and Social Security cards.

They also maintained that Alabama did not have the authority to try them as it was not properly re-admitted into the Union after the American Civil War.

While on death row, she was held at the Julia Tutwiler Prison for Women in Wetumpka, Alabama.