Former Manchester City youth player Courtney Meppen-Walter was released from jail by mistake, police have confirmed.
The 18-year-old was handed a 16-month prison sentence for killing Kulwant Singh, 32, and his sister Ravel Kaur, 37, in a car crash last September.
The Greater Manchester Police ensured that Meppen-Walter is put back into custody after the Prison Service informed them that the teenager has been released by accident.
Police Sergeant Danny Byrne told The Independent: "Officers visited Meppen-Walter's address last night and returned him back to prison in Lancaster.
"We are speaking to the family of the victims involved in this case to keep them updated with what has happened and our thoughts continue to be with them at this difficult time."
A Prison Service spokesman said: "Police have been informed after a prisoner was released in error on Monday July 1 to ensure he is promptly returned to custody. Releases in error are very rare and we take any incident extremely seriously. An investigation will take place into the circumstances that led to this release."
Meppen-Walter, who pleaded guilty to death caused by dangerous driving, escaped a five-year jail term.
