Tania's father Pat described Dyche as an "animal"
The family of murdered showjumper Tania Moore have called for the return of the death penalty following the case.
Tania Moore's father, Pat, called killer Mark Dyche "an animal", and criticised Derbyshire Police's inquiry.
Mr Moore said: "Tanya will never walk the streets again. Dyche will, however, get three square meals a day and watch TV and get free training."
The Derbyshire force admitted its work was below standard, but said lessons had been learned from the case.
Mr Moore called on Prime Minister Tony Blair to restore the death penalty.
"The kind of crime (Dyche) committed deserved capital punishment," he said. "May he rot in hell."
Mr Moore thanked his family and friends for their support, but criticised police for their investigations before the shooting.
He said: "If they had done a proper job we would not being having this trial."
Tania's mother, Stella, who has been in court throughout the three-week trial, looked tearful as the jury delivered its verdicts after less then three hours.
She has lodged an official complaint with Derbyshire Police over their handling of events leading up to her daughter's murder.
She criticised the force after Dyche continued to harass her daughter with threats and text messages despite several complaints.
Dyche was convicted of conspiring to rob Miss Moore, almost a year before her death.
Outside court, Det Supt John Briggs, of Derbyshire Police, said: "We have learned quite a serious lesson from it and we will now move forward and up the standards for the future.
"We have gone through the investigation of the robbery with brutal honesty with the family.
"The standard of that investigation was less than we would have wanted. We have made no secret of that.
"Now we know what we do know it has enabled us to get to the truth of what happened with the robbery.
"We are very pleased that we have managed to check a very dangerous individual who had gone almost unnoticed but my main pleasure in this is for the family."
He said the Moore family had undergone 15 months of torture and he was pleased that "some justice has been done" for them.