The soldier known as 'Marine A' could be released within weeks - and his lawyer believes this would represent justice.
Alexander Blackman, 42, was today (March 28) handed a commuted sentence of seven years on the grounds of diminished responsibility.
Blackman had been serving a 10-year sentence for murder, but this was overturned by judges at the Court Martial Appeal Court.
Because Blackman has already served almost three and a half years, good behaviour could see his release in just a few weeks.
Such an outcome would meet the demands of Blackman's lawyer, Jonathan Goldberg QC, who has said his client was at "breaking point" when he fatally shot a wounded taliban fighter in 2011.
Goldberg spoke to Sam Delaney after Blackman's murder conviction was commuted to manslaughter earlier this month. He said: "We have persuaded the court, who are not soft touches, that the six months of hell he endured leading up to this incident...were the sort of circumstances that turned his head.
"I'm talking about being fired on, having grenades thrown at him. I'm talking about conditions in the camp he was based at which few of us can even imagine they were so vile and primitive.
"A rambo-type, Arnold Schwarzenegger soldier exists only in the movies. This man had reached his breaking point."
Listen to the full interview above