Wojciech Sumliński (born 15 April 1969 in Warsaw) is a Polish psychologist, investigative journalist, publicist and film director.

[4] In 1997, he received the Ministry of Interior and Administration award for the cycle of reportages on border organized crime written under the pseudonym “Stefan Kukulski.” Two years later, he was nominated to the “Press” award in investigative journalism category for his publications on Henryk Goryszewski who, while presiding over the Sejm Commission of Public Finances, advised private companies on tax evasion.

The court decided to the advantage of the plaintiff as Sumliński failed to perform due diligence in collecting, analysing, and presenting arguments and evidence.

[12][13] On December 31, 2022, Sumliński posted a statement Facebook in which he apologized to the journalist and publicist Jacek Łęski for the fact that in his book entitled "Officer.

Czego ludzie żałują przed śmiercią", he provided untrue and unverified information regarding Łęski's alleged cooperation with the Office of State Protection (Urząd Ochrony Państwa).

[17][18] In December 2015, Warsaw District Court relieved Sumliński of all allegations concluding that the agents conducted their own “game” to acquire information on the Military Secret Service and Sumlinski was innocent.

[20] In his next article Korus pointed out to the sentences that were said to be plagiarised from the novels of John Steinbeck, Mitch Albom and Paulo Coelho.

[29] According to Tomasz Urzykowski from Gazeta Wyborcza, Wojciech Sumliński is "a journalist with extreme right-wing views, tracking down" Jewish conspiracies "against Poland and undermining Poles' responsibility for the crime in Jedwabne".

In the second part, he states: "Documents and other materials piled up like mountains, and their overall analysis showed one thing - that those who accused our ancestors of crimes and other atrocities used a mechanism called “catch a thief.” As rule, it is not Poles, but Jews, who collaborated with the invaders and behaved viciously.

The author who once aspired to discover the truth about President Komorowski, Prime Minister Tusk, who wrote about priest Jerzy Popiełuszko as of his personal teacher, is now degrading himself with more and more sucked-out topics.