Even more videos ???? https://www.france.tv/france-5/c-dans... Subscribe https://youtube.com/@cdanslairofficie... Lina: the secrets of an extraordinary investigation - C dans l'air - 10/19/24 He was found submerged in a river. The body of Lina, a teenager who disappeared thirteen months ago in Alsace, was discovered on Wednesday in a wooded and isolated area of ​​Nièvre. DNA analysis confirmed that it was indeed the young girl. Since her disappearance on September 23, 2023, investigations had not been able to find her, despite searches, lake surveys and dog tracking. After a last phone call to her boyfriend that day, her phone had stopped signaling along the D350, while Lina was going to the Saint-Blaise-la-Roche train station. A suspect, Samuel Gonin, 43, had been identified this summer, but he committed suicide while he was due to be tried a few days later for a case of violent robbery. In his vehicle, investigators found the case of Lina's phone and ropes with both of their DNA. It was while retracing the route of the vehicle on the day of Lina's disappearance that investigators came across the teenager's body. Although Lina's family has not yet wished to react, questions remain about the exact circumstances of her death. It is to unravel these mysteries that profilers like Marie-Laure Brunel Dupin work. Although she became the first behavioral analyst in France 24 years ago, the lieutenant-colonel now manages 23 people within the Unsolved Cases Division. Her goal: to guide investigators. They analyze the victim's life, that of her friends to understand all the facets of a case. The work of behavioral analysts also continues during police custody. The suspect's actions are observed, to detect the slightest detail that could betray him. This is where some serial killers sometimes end up cracking, like Jacques Rançon, the killer at Perpignan train station, sentenced to life in prison for the rape and murder of Isabelle Mesnage in 1986. But revelations of this kind remain rare. The case of Little Gregory is the best example: forty years after the murder of the little boy in the Vosges, the culprit has still not been found. In a comic strip published by Arènes, Jean-Marie Villemin, the little boy's father, decided to speak out. The cartoonist Pat Perna, who became friends with him, set himself the dual objective of bringing little Gregory back to life through his drawings, and of paying tribute to his parents, caught up in a media storm at the time of his disappearance. What questions remain after the discovery of Lina's body? How do profilers work to try to solve the most inextricable cold cases? And what can the case of little Gregory teach us, forty years after his disappearance? The experts: Damien DELSENY - Deputy editor in chief in charge of the police-justice department - Le Parisien Noémie SCHULZ - Senior reporter specializing in police justice - France Télévision Marine ALLALI - Lawyer specializing in criminal cases - Cabinet Seban & Associés Marilyne BARANES - Doctor in clinical psychology and psychopathology, legal expert François DAOUST - Former director of the Criminal Research Institute of the National Gendarmerie (by Skype) Find us on: Our website: https://www.france.tv/france-5/c-dans... Facebook: / cdanslairf5 Twitter: / cdanslair Instagram: / cdanslair Broadcast: every day of the week at 5:45 p.m. Rebroadcast: every day of the week at 10:30 p.m. Format: 65 minutes Presentation: Caroline Roux and Axel de Tarlé Production: France Télévisions/Maximal Productions