Ciepliński was executed at Mokotów Prison in Warsaw, with a shot to the back of the head by the Polish secret police, Urząd Bezpieczeństwa.
[2] Ciepliński was born in the village of Kwilcz, Kreis Birnbaum (Polish: Powiat międzychodzki), in then German Empire's Province of Posen, now back again Poland.
After graduating from high school, Ciepliński enlisted with the Third Cadet Corps in Rawicz, and in 1934 enrolled in the Military College in Ostrów Mazowiecka.
In late fall 1939, he moved to the environs of Rzeszów and from there crossed the Carpathian Mountains to Budapest where he came into contact with the Polish military.
Promoted to the rank of commandant of the Rzeszów District of the Związek Walki Zbrojnej, later called the Home Army, he distinguished himself in several operations.
In the spring of 1944, Ciepliński, now promoted to the rank of major, carried out the so-called "Kosba Action", aimed at the liquidation of the Nazis in the area of Rzeszów.
On the night of 7–8 October 1944, Ciepliński's unit conducted an unsuccessful operation to free some 400 Home Army soldiers, imprisoned by the Soviet NKVD at the former Nazi Gestapo regional headquarters at the Rzeszów Castle.
Fearing Communist reprisals, in early 1947, along with his wife Jadwiga, Ciepliński moved from Kraków to Zabrze, where they opened a textile store.
Finally, he was successful on one occasion when, with assistance from officials of the Belgian embassy, he was able to smuggle documents informing the West about the dire situation in Poland.
[citation needed] The Soviet NKVD and Urząd Bezpieczeństwa were on his trail during this entire period and, finally, on 28 November 1947, he was arrested in Katowice.
[citation needed] In another letter dated 28 January 1951, also smuggled out of prison, Ciepliński wrote to his wife My Dearest Wiesia, I am still alive, although these are likely to be my last days.
And I would like so much to receive even few words written by your hand […] I thank God that I can die for His holy faith, for my Country, and that he gave me such a good wife, and such a happy family life.The trial which finally took place in October 1950 before the Military Court in Warsaw was presided over by Chief Military Judge Colonel Aleksander Warecki (real name Warenhaupt), Major Zbigniew Furtak, Major Zbigniew Trylinski and Lt. Col. Jerzy Tramer, who served as the Public Prosecutor.
In early December 2007, Rzeszow's branch of the Polish Institute of National Remembrance (IPN) announced publication of the first IPN-sponsored comic book.
The work which presents the life of Lukasz Cieplinski was conceived by the Rzeszow University's Wojciech Birek (author of the screenplay) and Grzegorz Pudlowski, who drew all the pictures.
His widow, Jadwiga Cieplinska and their little son Andrzej, who was only 3 years old when his father was executed, were ostracized, lived in poverty, and remained under the ever-watchful eyes of the Polish secret police.