A report issued on Wednesday said Signaller Geffrey Gregg, of Perth, believed he may have shot a child or teenager during a particularly harrowing patrol in Afghanistan, in 2002.

He subsequently developed post-traumatic stress disorder, was discharged from the army and killed himself in September 2006. He was 25.

Signaller Gregg's suicide prompted three reviews into his enlistment, service, discharge and post-discharge.

The results of those investigations were issued by the Department of Defence and the Department of Veterans' Affairs, in the collectively titled Gregg review.

The family's lawyer, Ben Mason, of Slater & Gordon, said the Greggs had not ruled out taking future action.

''An inquiry of this nature which reveals a number of failings within a number of separate departments ... it needs to be looked at closely,'' Mr Mason said.

''There is potentially a range of actions that arise from this, but they [the family] are keeping their options open.''

The family is seeking a claim through the military compensation scheme, on behalf of Signaller Gregg's estate.

In a statement issued yesterday, Mr Mason said the defence agencies involved in the report might feel better, but the family was still suffering.

The review involved the Defence Department, the Department of Veterans' Affairs and military superannuation provider ComSuper.

''No doubt Defence, DVA and ComSuper will feel good that they have dealt with Geffrey's case and can now put it behind them,'' he said.

''But the test of their real intentions and the value they place on the Gregg family's sacrifice is what happens from now on.''

Mr Mason said according to the report, about 38,000 veterans in Australia had a mental health condition, the most common being post-traumatic stress disorder.

About 30 per cent of those were not receiving any treatment and the figures only represented those veterans who had navigated the red tape.

In light of the report, the Government has moved to improve mental health services for serving and former defence force members. AAP