A soldier could be charged with murder more than 30 years after a woman was shot dead at her home in Londonderry.
The possibility of proceedings against a member of the Royal Green Jackets, known only as Soldier D, emerged after a hearing in the High Court in Belfast on Wednesday.
Kathleen Thompson, 47, from Rathlin Drive in Creggan, died after being struck by a high velocity bullet in November 1971.
Lawyers for Ms Thompson have applied for a judicial review.
They want judges to examine the failure of the DPP to provide "full and sufficient" reasons for the decision not to prosecute the soldier, who admitting firing 18 shots during a midnight raid.
Mr Justice Girvan reserved judgement.