Bogdan Eugeniusz Arnold (17 February 1933 – 16 December 1968) was a Polish serial killer who murdered four women in Katowice from October 1966 to May 1967, hiding their bodies in his apartment.

Arnold lived in Katowice at 14 Dąbrowski Street, where he occupied several rooms in an apartment on the fourth floor.

According to Arnold, he initially did not plan to kill his first victim, but when she offered him sex for 500 zlotys, he was enraged since he considered himself attractive enough to get it for free.

In a fit of anger, Arnold killed Maria with a hammer and placed the body in the bathroom, having previously covered it with chlorine in order to slow down the process of decomposition.

Arnold himself did not visit his apartment for several days due to the impossibility of living with four corpses, worrying his neighbours further.

Finally, on 8 June 1967, a police officer, who was on personal business in the area of Granicnaya Street near the Silesian zinc refinery, drew attention to the slovenly appearance and dirt on the clothes of one of the passersby.

[5][6] Arnold was buried in an unmarked grave at number 38 in a special cemetery for executed Polish criminals.