A prolific sex offender in his native country, Kunowski later moved illegally to England, where he murdered 12-year-old Macedonian girl Katerina Koneva in 1997.
When he was still young, the family moved to Mława after his father was offered an apartment in the city center by the PBRol company, which wanted to hire him.
[3] While his parents were regarded as decent, likeable people, Andrzej was considered a nervous, troublesome child who constantly had problems at school and had difficulty conversing with his peers.
[3] According to several contemporary Polish newspapers, Kunowski would often spot women picking strawberries by the road while driving, whereupon he would stop the ambulance, run into the field, drag his victims to the nearby bushes, and then rape them.
[3] At the time of his arrest and trial in Ciechanów in 1980, Kunowski was charged with attempted murder, 25 counts of rape, robberies, and escape from custody.
The prosecutor, Waldemar Smardzewski, requested that the defendant be given the maximum penalty of 25 years imprisonment, expressing his concern that Kunowski's crimes would progressively worsen if he were released.
[4] During this time, he was a suspect in the disappearance of 14-year-old student Agnieszka Grzybicka, who mysteriously vanished after finishing her lessons at one of the primary schools in Mława.
Despite a joint effort by local resident and the police to locate her, Grzybicka was never found, leading some to believe that she had been abducted and killed.
However, Kunowski, who had sold his flat in Mława the previous year, used the money to buy himself a fake passport and flee to England.
[1] Shortly after the murder, Scotland Yard announced a 20,000 pound reward for any information that may lead to the capture of Katerina Koneva's killer.
The English authorities initiated interviews with Kunowski, during which he confessed that he was evading the Polish police due to charges of rape.