In prison, Clark befriended another criminal – Jan-Erik Olsson, who later, in 1973, while on parole, decided to rob Stockholm’s largest bank, Kreditbanken, located in the central Norrmalmstorg square. This robbery is known in history as the “Norrmalmstorg Robbery”.

In the series, Odminiu square became the famous Norrmalmstorg square, where police officers were trying to negotiate with J. E. Olsson with hundreds of people watching. When traveling from Vilnius Town Hall, pass through scenic Vokieciu, Dominikonu and Universiteto streets to reach Odminiu Square, which is the next stop on the route.

When negotiations between the criminal and the police began, Jan Erik Olson demanded three million kroner, two pistols, protective vests and helmets, as well as a Ford Mustang car with a full tank of gas and, most importantly, he demanded to release and bring to the bank an experienced bank robber and a good friend – Clark Olofsson. Jan Erik Olson’s instructions were followed: Clark was brought and allowed inside the bank, the car and money were delivered, but Jan Erik Olson delayed escape because he realized that leaving the bank would make him a perfect 

target for police bullets.

It was a very unusual robbery. The Swedish police listened and tried to predict what was happening in the bank vault where the criminals were hiding with the hostages. The kidnappers and the bank workers quickly became friends, shared experiences and stories, played various games. One of the hostages even called the Prime Minister of Sweden and asked to let Clark Olofsson and Jan Erik Olson go out, not to use violence, and even offered to go with them as a guarantee that both sides would keep the agreement. When the hostages were released, none of them testified in a court against their captors, instead, they began collecting money for their defense. Clark managed to prove in court that he did not participate in the robbery and cannot be treated as an accomplice but, on the contrary, tried to help the hostages.