Daniel Crook was given a short jail sentence.
Gulam's father, Shah Zada, says he has received $800 (£510) in compensation.
The case was brought by a Birmingham law firm after British media reported on Crook.
The Royal Military Police opened 126 investigations of incidents in which British troops 'killed or injured' Afghan civilians between January 2005 and March 2012.
Only eight of these led to prosecutions some of which were held in private summary hearings.
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