The families of two of the five women murdered by Steve Wright have called for the death penalty to be reinstated.
Relatives of Paula Clennell, 24, and Tania Nicol, 19, demanded he suffers "the ultimate punishment".
Describing Wright, 49, as a "monster", Miss Nichol's family said he deprived his victims of their human rights.
Miss Clennell's mother, Isabella, said that by murdering the five women, Wright had been responsible for "ruining a lot more lives".
Jurors also found Wright guilty of the murders of Annette Nicholls, 29, Anneli Alderton, 24 and Gemma Adams 25.
The naked bodies of the women, who all worked as prostitutes, were found in the Ipswich area over ten days in 2006.
In a statement following the verdict, Miss Nicol's family said: "Today, as this case has come to an end, we would like to say justice has been done but we are afraid that while five young lives have been cruelly ended, the person responsible will be kept warm, nourished and protected.
"In no way has justice been done.
"These crimes deserve the ultimate punishment and that can only mean one thing.
"Where a daughter and the other victims were given no human rights by the monster, his will be guarded by the establishment at great cost to the taxpayers of this country and emotionally to the bereaved families.
"The public must insist that this government look at returning the death penalty for cases such as this, otherwise many more families will go through the same suffering that we have had to endure."
Miss Clennell's mother, Isabella, also called for the death penalty in a statement.
Mrs Clennell said: "Justice has been done. Steve Wright will hopefully serve the rest of his life in prison.
"I wish we still had the death penalty as this is what he truly deserves.
"He murdered five girls but at the same time has ruined a lot more lives.
"It's hard to explain the grief, sorrow, hurt and anger my family and I have suffered."
Steve Wright is due to be sentenced on Friday
Annette Nicholl's family thanked Suffolk police alongside the prosecution and forensics' team for bringing Wright to justice.
In a statement read by police on their behalf, the family said: "No punishment this person receives will ever be enough for us.
"Nothing will bring our beautiful, loving ... daughter and sister back home.
"This man has robbed ... the parents of a loving and much loved daughter and siblings of a loving sister.
"But at least we can rest knowing that this man is no longer on the streets of Ipswich, ready to take another girl's life."