Franc Frakelj[?] - member of collaborational White Guard - 2nd World War war criminal (never convicted, died in Canada).
Leon Rupnik[?] (1880 - 1946) - general, commander of collaborational Slovenian home guard - 2nd World War war criminal (convicted, executed by shooting).
... correct if the coefficients a, b and c are complex numbers, or more generally members of any field whose characteristic is not 2. (In a field of characteristic 2, th ...