Joanne Tulip. STEVEN Ling remains behind bars for his brutal and cowardly actions 23 years ago. But the mother of Joanne Tulip has had both grief and legal proceedings to cope with for more than two decades. After Ling was convicted of Joanne s murder and sentenced, it later emerged he had told police that he wanted to kill himself because he had raped Joanne before killing her – but he never stood trial for rape. Since then, Doreen has campaigned tirelessly for justice for her daughter, including a decade-long push for a change in the law which now means that both murder and rape charges are pursued through the courts.