Wladyslaw Mazurkiewicz (January 31, 1911 – January 29, 1957) was a Polish serial killer from the post–World War II Kraków, who also owned property in Warsaw.
His economic standing and polite manners in Stalinist Poland earned him the nickname "the Gentleman Murderer" (elegancki morderca), also "piekny Wladek" (the Handsome Wladek).Mazurkiewicz was arrested in 1955 and charged by the prosecution with six murders and two more attempted murders.
He was convicted of killing four men and two women including Wiktor Zarzecki, Wladyslaw Brylski, Józef Tomaszewski, and millionaire Jerzy de Laveaux along with his wife Jadwiga de Laveaux and her sister, Zofia Suchowa.
He was tried by the regional court in Kraków and sentenced to death on August 30, 1956.
He was executed by hanging six months later on January 29, 1957, two days before his 46th birthday.
According to various rumours, Mazurkiewicz might have been responsible for as many as 30 murders, which were never confirmed.
However, he himself pleaded not guilty, and claimed in court to have been beaten and blackmailed during interrogations.