[6] Arklöv told the police that he received corporal punishment, which has been illegal in Sweden since 1979, from his adoptive parents from grade 1 to 8.

[9] Not much is known about the group but Swedish journalist Magnus Sandelin wrote a book about Arklöv called The Black Nazi (Den Svarte Nazisten) detailing his childhood and his time in the war.

Sandelin is one of few reporters who has been able to study some material from the war diary and wrote that Arklöv had written that he participated in "cleaning up" towns, by throwing grenades into houses and then shooting those inside.

[11] Arklöv once went back home to Sweden for a short break, and has admitted to experienced psychosis-like hallucinations from the war then.

It is documented that he once saw a black dog in his room at home while fully awake, and his family and friends which he slept at has stated that they heard that Arklöv had night terrors, but he still went back to Yugoslavia and to his group and continued his life as a mercenary until the fighting ended.

The crimes were severe and he had, among other things, forced a woman to say "Allahu akbar" before shoving his rifle into her mouth, whipped prisoners with a Waffen-SS belt, abused and tortured pregnant girls, as well as having beaten young men and broken their arms and legs.

When civilians were forced under torture to humiliate themselves by Arklöv but did not obey him, other guards would step in and tell the victims to "do as he says, or he'll kill you, he is totally insane" and laugh.

[15] Arklöv wrote in his diary that joining the Croatian militia was a fulfillment to his "fascist dream" and that killing Muslims was "almost as good as an orgasm".

After being released, Arklöv and Olsson met with the other members of the newly started NRA (Nationalistiska Republikanska Armén, "the Nationalist Republican Army"), among them Andreas Axelsson and Mats Nilsson.

[citation needed] Among the neo-Nazis, it was mainly Olsson who wanted Arklöv in their group of friends, while many of the rest thought it was "strange that a black, adopted man was hanging out with them".

The arrangement with the Nazis resulted in a robbery tour of the Swedish province of Östergötland in 1999, which ended on 28 May in Kisa where Arklöv, Axelsson and Olsson robbed Östgöta Enskilda Bank.

As the vault was time-locked, the robbers were forced to wait 12 minutes before leaving the bank with a large sum of cash.

About 10 minutes later two policemen, Olle Borén and Robert Karlström, spotted the robbers' vehicle and drove after them in their own police car.

Arklöv went to Stockholm and met two women in a shopping mall, who later witnessed that he behaved oddly and as if he was in shock.

[21][17][22] In March 2004, the Dagens Nyheter journalist Maciej Zaremba published an article strongly criticizing the closure of the case about Arklöv's war crimes when he was returned to Sweden from Bosnia, and he also managed to find several witnesses and victims of Arklöv from when he guarded prisoners in Croatian concentration camps.

The judges made their ruling on 18 December 2006 and the court ruled that Arklöv was guilty of wrongful imprisonment, torture and assault of 11 Bosnian Muslim prisoners of war and civilians, ethnic cleansing, looting, and arbitrary detention of people; crimes protected by international law.

[25][26][4] His paintings often depicts historical battle scenes, nature landscapes, surrealism, caricatures and war memories.