A senior policeman in the Charlie Hebdo investigation reportedly killed himself hours after meeting relatives of one of the victims.
Helric Fredou used his rifle to shoot himself in his office on the night of last Wednesday's terrorist outrage.
According to French media, the 45-year-old had not yet filed a report on his interview with the family.
Mr Fredou was deputy director of the Regional Service of the Judicial Police in his hometown Limoges in central France.
The son of a policeman, he was discovered by a colleague at around 1am last Thursday. It is unclear if his death was linked to the terrorist attack.
In late 2013, Mr Fredou found the body of a colleague from the same force who also committed suicide in a police building.
Officers told TV channel France 3 that Mr Fredou, who had no children and was single, was `depressed and burned out'.
France's national police union said officers were `hit hard by the tragic death of one of their own' at such a time of national mourning.
