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.
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Detectives in Westminster are investigating after the man was discovered on the Route 189 bus in Marylebone shortly after midnight.
The murderer was shaking and appeared to be gasping for air for around 13 minutes before dying.