The man in his forties was "known to the police for acts of violence".
According to the first elements of the investigation, witnesses heard the couple arguing and saw the man, in his forties, pushing his girlfriend through the window of the first floor of the building where they were, a said Troyes public prosecutor Olivier Caracotch, confirming information from East lightning.
Also in her 40s, the woman was taken to hospital in critical condition and her life-threatening "always engaged", he added. The investigation was opened for "homicide attempt by spouse or cohabiting", said Olivier Caracotch, stating that the man "had consumed alcohol at the time of the facts" and was still in custody Sunday night.
According to a source close to the investigation, the dispute broke out around 18 hours, and the toxicological analyzes conducted in custody revealed that the suspect had "1.6 grams of alcohol in the blood".
The couple "had been dating for a few weeks" only, and the man was "known to the police for acts of violence", added this source, without specifying whether it was domestic violence. The suspect is also prosecuted for violence on the depositary of the public authority, following an arrest "difficult" according to the parquet floor.