Police said Meppen-Walter was "erroneously released" from prison yesterday. He was visited by police officers at his home address last night and, once officially informed of the mistake, voluntarily returned to prison in Lancaster, where he will now serve the remainder of his sentence.
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.
More top news
The 13-year-old died in hospital after being hit in the back of the head by a bullet when his cousin fell of a hoverboard.
The psychiatrist brother of Chancellor George Osborne faces being struck off after admitting to an affair with a "vulnerable" patient.
Three men have been jailed for helping a 17-year-old join IS - after a trial heard one of them shared affectionate texts with the teenager.