 The initial investigation had uncovered little of signficance, but, once detained, Pettersson was picked out from a ten-person police lineup by Lisbet Palme.Pettersson denied any involvement, claiming he had liked Olof Palme and had left central Stockholm at the time of the murder.However, Lisbet Palme's identification in combination with statements by acquaintances of Pettersson, who stated that he had been near the scene of the crime at the night of the murder, led to a 1989 conviction for murder.