Bacterium-related
Bacterium-related cutaneous conditions often have distinct morphologic characteristics that may be an indication of a generalized systemic process or simply an isolated superficial infection.
Lizzie Borden (1860–1927) allegedly killed her father and her stepmother with an axe in Fall River, Massachusetts, in 1892. She was acquitted, but her innocence is still disputed. Iyasus I of Ethiopia (1654–1706), one of the great warrior emperors of Ethiopia, was deposed by his son Tekle Haymanot in 1706 and subsequently assassinated.In more contemporary history there have also been instances of father–offspring conflicts, such as:

Chiyo Aizawa murdered her own father who had been raping her for fifteen years, on October 5, 1968, in Japan. The incident changed the Criminal Code of Japan regarding patricide. Kip Kinkel (1982- ), an Oregon boy who was convicted of killing his parents at home and two fellow students at school on May 20, 1998. Sarah Marie Johnson (1987- ), an Idaho girl who was convicted of killing both parents on the morning of September 2, 2003. Dipendra of Nepal (1971–2001) reportedly massacred much of his family at a royal dinner on June 1, 2001, including his father King Birendra, mother, brother, and sister. Christopher Porco (1983- ), was convicted on August 10, 2006, of the murder of his father and attempted murder of his mother with an axe. Terminology
Biological fathers
Baby Daddy – A biological father who bears financial responsibility for a child, but with whom the mother has little or no contact. Birth father – the biological father of a child who, due to adoption or parental separation, does not raise the child or cannot take care of one.