AS he was led away to prison for child murder, police pledged that they would seek justice for families of other missing girls
The pledge to continue to re-examine cold cases linked to the notorious Scottish paedophile Robert Black.came after he was found guilty at Armagh Crown Court of kidnapping and murdering Jennifer Cardy in Northern Ireland 30 years ago.
Black (64) has also been linked with the suspected abduction of six-year-old Mary Boyle, who disappeared from the fields around her grandparents' home near Ballyshannon in Donegal in 1977.
He was a regular visitor to the Donegal area as a delivery driver.
While the Boyle family do not believe Black was responsible, her mother Ann did say that she would like gardai to reinvestigate the link.
"Perhaps gardai can look at this again. I hope they will be able to investigate and find out for definite," she said.
While Black has now been convicted of four child murders, he is suspected of involvement in many other crimes, notably the 1978 abduction of Devon schoolgirl Genette Tate.
As Jennifer Cardy's parents revealed they had prayed for their daughter's killer, a senior detective insisted the investigation into Black would not stop.
"I certainly think the story of Robert Black doesn't end here today, there are lines of inquiry which we still have and we are still looking at," Detective Superintendent Raymond Murray said after the jury delivered their unanimous verdicts.
Jurors took four hours and 15 minutes over two days to find Black guilty of kidnapping and murdering Jennifer on August 12, 1981.
Outside the court, Jennifer's father Andy said the family's strong Christian faith had sustained them through the horrors of the trial.
He said: "We have been able to live without bitterness and vengeance in our lives and when we lost Jennifer, life was never the same but life had to go on and we had to live life.
"Robert Black stole the life of our daughter, Jennifer, but Robert Black didn't steal the lives of me and my family -- we've lived a happy, prosperous life, but we miss Jennifer each and every day."
Mr Cardy, flanked by wife Patricia, daughter Victoria and sons Mark and Philip, said the family had prayed for Black.
But he said he believed Black should pay the ultimate price for his crimes.
"I would have to say that I would still say that somebody who commits murders like this, I believe their lives should be taken, I believe they should be put to death, that's my belief," he said.
There were gasps around the court- room as the verdicts were read out shortly after midday, but Black showed absolutely no reaction - remaining as impassive as he had been through the six-week trial.
The killer is already serving life in Wakefield prison in England for three other child murders and additional crimes.
The minimum term Black will have to serve will be set at a separate hearing before Mr Justice Weatherup in Belfast next month.
Black's lawyers are currently considering whether they will appeal against the verdicts.
In 1994, Black was convicted of three unsolved child murders in the 1980s - those of 11-year-old Susan Maxwell, from the Scottish Borders, five-year-old Caroline Hogg, from Edinburgh, and Sarah Harper, (10) from Morley, near Leeds - and a failed abduction bid in Nottingham in 1988.