https://www.bbc.co.uk/news/uk-northern-ireland-56942056
The trial opened last Monday and heard a day of evidence before moving to the issue of whether statements and interviews given by the ex-soldiers would be admissible.
The court was told that evidence implicating the soldiers came from two sources - statements given to the Royal Military Police in 1972 and interview answers given to the HET in 2010.
The PPS accepted that the 1972 statements would be inadmissible in isolation, due to deficiencies in how they were taken including that the soldiers were ordered to make them and they were not conducted under caution.
However, prosecutors argued that the information in the 1972 statements became admissible because they were adopted and accepted by the defendants during their engagement with the HET in March 2010.
However, the judge said it was not legitimate to put the 1972 evidence before the court "dressed up and freshened up with a new 2010 cover".
He questioned why the HET's re-examination did not prompt a fresh investigation by the Police Service of Northern Ireland (PSNI), with the veterans interviewed under caution.
The judge suggested that course of action might have made a prosecution more sustainable.