In 1991, Linderman worked in the Russian editorial office of the Atmoda newspaper. In 1998 he was the leader of the Latvian branch of the National Bolshevik Party (NBP). From 2002, Linderman was a member of the Central Committee of the NBP. In November 2002, he went to Saratov to take part in the trial of the NBP founder Eduard Limonov as a defence witness. On September 24, 2003, Linderman was arrested by the Federal Security Service (FSS) in Moscow and spent 19 days in Lefortovo Prison.[2] Latvia requested Russia to extradite him, but Russia refused, citing fears of political persecution.[4] On June 21, 2006, Linderman was arrested again, but during his convoying to Latvia Linderman escaped and remained in hiding for two more years.[2]
In 2008, Linderman was finally found and on March 20 extradited to Latvia, where he was accused of storing explosives, calling to overthrow the political system and planning to assassinate the President of LatviaVaira Vīķe-Freiberga.[4] On October 6, 2008, Linderman was given a one-year prison sentence suspended for twelve months for the possession of a TNT block with a detonator, but was cleared on the charges of inciting to overthrow the government due to lack of evidence. On October 26, 2008, he attempted to enter Estonia from Finland, but was detained at the Tallinn Passenger Port, where Linderman was informed he is banned from entering the country and sent back to Finland.[5]
On May 8, 2018, Linderman was arrested by the Security Police[14][15] for a suspected incitement of national, ethnic and racial hatred, performing activities aimed against Latvia's independence, sovereignty, territorial integrity, state power and government structure, as well as organizing mass riots[16] in a March 31 speech he gave at the "All-Latvian Parents Gathering" organized by the Latvian Russian Union.[14] On May 10 Linderman was kept in custody,[17] but finally released on May 22.[16][18]