When he was 14 years old, he played with Psí vojáci at another concert held in Hrádeček. The band and other Topol's activities, as well as his family background and ties with the illegal Charter 77, attracted the attention of StB, the Czechoslovak secret police. He was first interrogated when he was 14 years old, along with his mother. His band was banned by state authorities and was allowed to perform only in 1986. Before that, they performed illegally and released samizdat recordings. After the Velvet Revolution in 1989, Psí vojáci became a professional band.