THE parents of German backpacker Simone Strobel, who was murdered in Lismore in 2005, are still searching for answers.
Manfred Schweidler, a journalist with Main Post in Simone's hometown of Würzburg in Germany, has written an article in his newspaper this week to mark 10 years since her death.
He wrote that her parents, Gustl and Gabi Strobel, have spent the last 10 years in "agonising uncertainty".
"They have simple questions, but they get no answers," he reported.
Schweidler went on to say that Simone's three travelling companions - her then boyfriend Tobias Suckfuell, Katrin Suckfuell and Jens Martin - had a "right to remain silent".
But he also said they should have the greatest interest in seeing the case resolved, particularly since investigators in Germany and Australia have said they are the "only identifiable suspects".
Simone's father, Gustl, told Schweidler he was angry.
"It's hard to take that three people know how Simone died - and are not useful to us," he said.
"I'm not about punishment ... but I want to know what happened so that we can draw a line and finally have peace."
In the Main Post, he appealed to Tobias, Katrin and Jens to break their silence.
Gustl said he had approached all three in person, but said Katrin told him she would never speak about the case, "not even under torture".
A memorial service was held at the Catholic church in the vineyards of Simone's hometown this week, marking 10 years since her death in Lismore.
Gustl told Schweidler he was glad that people had not forgotten his daughter.
"We do not feel left alone," he said.
"Not even the investigators in Würzburg and Australia have not put the case on file. They hope for progress in forensics."