Karl Kast

Siegfred Karl Kast (c. 1916 – 1 December 1955)[1] was a German immigrant to Australia who shot dead two doctors and unsuccessfully attempted to detonate a bomb in Wickham Terrace, Brisbane, before committing suicide.

George Boland, a patient of one of the doctors in the building, attempted to stub out the bomb only to have it explode and maim his hand.

Following his rampage, Kast locked himself in the office of Dr Lahz, within Ballow Chambers, where he shot himself and ignited another bomb.

[2][3][4] A brown paper parcel was delivered to the Brisbane Criminal Investigation Branch containing a letter from Kast claiming that he "did not receive justice elsewhere" and listing his four victims by name.

[3] The tragedy was reported in the Courier-Mail on Friday, 2 December, as "...a horrible crime ...[that]...sent a shock of horror through the city and all Queensland".