Jeremy Forrest appeared before magistrates in the French city last week.
His UK solicitor Phil Smith has said his client looks forward to the "full story" emerging in the coming months.
He ran away with his teenage pupil in September, sparking a Europe-wide search and prompting public appeals from both sets of families.
The pair were eventually found in Bordeaux, and Forrest was arrested on suspicion of child abduction following the issuing of a European Arrest Warrant.
More top news
Temperatures set to slide
The announcement was hailed as a "momentous step" that will help families facing financial stress as they come to terms with their loss.
Pop Idol's Michelle McManus has joined 10 choirs to record a charity single that they hope will make Christmas Number One.