With this ruling, one of the most shocking criminal cases in France in recent decades has come to a close. On June 4, 2026, the Loire Atlantique jury court sentenced the German serial killer Martin Ney to life imprisonment for the abduction and murder of 10-year-old Jonathan Coulombe.
This case attracted the attention of the French public since the spring of 2004. Jonathan was participating in a group excursion in the coastal town of Saint-Brevin-les-Pins when he disappeared without a trace during the night between April 6 and 7. For weeks, investigators, volunteers, and family members worked to find the boy. Six weeks later, the sad truth was confirmed. His body was found in a pond near Guérande, weighed down and hidden with concrete blocks.
The investigation showed a maze-like pattern over several years. Numerous leads ended in vain, and suspects came under court scrutiny only to disappear again. Gradually, the allegations against the German Martin Ney became clear.
Now 54 years old, he is one of Germany’s most notorious child murderers. Nicknamed the “man in black” and the “masked man,” he had already attracted media attention before the French trial. In 2012, German courts convicted him for the murders of three boys between 1992 and 2001, as well as multiple charges of sexual abuse of minors, and Ney is already serving a life sentence in Germany.
In the trial held in Nantes, the defendant denied all responsibility for the death of Jonathan Coulom. There was no confession, and the prosecution relied on numerous pieces of evidence. Investigators pointed out distinct similarities with Ney’s previous crimes, reconstructed his movements at the time, and presented witness statements. In particular, the testimony of a former inmate attracted attention, reporting that Ney had made problematic remarks.
The prosecution painted a clear picture of the case. They charged that the “criminal signature” of the German serial offender was evident. Accordingly, the prosecution demanded the maximum penalty of life imprisonment.
The court accepted these claims along with a guilty verdict.
For Jonathan’s family, this verdict means above all a belated full stop after more than 22 years of ongoing uncertainty, pain, and hope for answers. After the sentencing, the boy’s stepfather described this moment as a just moment, saying that Jonathan can now rest in peace.
However, this tragedy will never completely disappear. The Jonathan Coulom case remains a symbol of how long it can take to find the truth and how persistently investigators must work across borders, even after decades, to achieve justice.
Author: C. Hatty