Joanne Lees, the girlfriend of Peter Falconio, has urged Bradley Murdoch to reveal what happened to his body, after his conviction for murder.
Miss Lees, 32, of Brighton, made her plea standing with Mr Falconio's family outside court in Darwin, Australia.
She said: "I would like Bradley John Murdoch to seriously consider telling me, Joan and Luciano (Mr Falconio's parents) what he has done with Pete."
The body of Mr Falconio, 28, has never been found since murder in 2001.
Miss Lees, from Brighton, East Sussex, said the verdict "eases the burden" on her and Mr Falconio's family.
She said the four years since she and Mr Falconio were ambushed by Murdoch on a road north of Alice Springs had been "traumatic".
She said: "It's the conclusion of an intense period of stress for myself and the Falconio family. This will enable us to take another step in the grieving process for Pete."
Miss Lees voiced her thanks for the support of her family and friends and praised the Northern Territory Police for catching Murdoch, 47.
"I'd also like to acknowledge the two truck drivers Vince Millar and Rodney Adams who took me to safety on that night," she said.
Miss Lees distanced herself from several books which are due to be published about the case, saying she had not spoken to any of their authors.
Mr Falconio's brother, Nick, said he had mixed feelings about the verdict after Murdoch was jailed for life.
"Today is not a celebration for us. We've waited over four years for this day. We are grateful for the efforts of the police and prosecution and jury in achieving justice today.
"We are pleased with the verdict; however, this will not bring Peter back."