He was minister of internal affairs from 27 May 1931[1] until his 1934 assassination, and was posthumously awarded Poland's highest civilian and military decoration, the Order of the White Eagle.

His death gave Poland's Sanation government a justification to create, two days after the assassination, the Bereza Kartuska Prison.

The prison's first detainees were almost entirely the leadership of the Polish nationalist far-right National Radical Camp (the ONR), arrested on 6–7 July 1934.

[2] Sentenced to death in the Pieracki assassination were Stepan Bandera, Mykola Lebed and Yaroslav Karpynets.

Their sentences were commuted to life imprisonment, and both managed to escape during the German invasion of Poland.