"Urgent! Urgent! Urgent! Shots are fired! Shots are fired!" an officer yells as his car hastily reverses away from the Stoccos.

About five minutes later, the pair shot at Senior Constable Matthew Shaw, of Wagga Traffic and Highway Patrol, during another pursuit.

He also reversed away before pursuing them for a further 40 minutes.

Constable Shaw said he heard “two loud cracks and a puff of dust come up from the side of the road” and realised he was being shot at.

He told the court on Friday he couldn't forgive himself for losing the Stoccos during the pursuit and allowing them to then potentially harm others.

"It took a long time to get over what happened," he said in a victim impact statement.

Gino Stocco, 58, and Mark Stocco, 36, stripped a farm caretaker naked after murdering him and hid the body under bushes to "cover their tracks" during an extraordinary time on the run, a court has heard.

The notorious pair evaded authorities for eight years and shot at officers during a dramatic 12-day chase across NSW and Victoria.

The pursuit ended when they were arrested on Pinevale, a remote property at Elong Elong in Dunedoo, 45 kilometres east of Dubbo, in October 29, 2015.

Mr Cimone's children also gave a victim impact statement and wept as they described their ongoing nightmares and flashbacks about the way their father, a "gentle giant", was killed.

At the height of their run from police, they returned to Pinevale in an attempt to hide but were found by police after a member of the public saw their ute in the nearby Goonoo State Forest.

It was only after their arrest on October 29, 2015, that police found the badly decomposed body of Mr Cimone.

The pair pleaded guilty to several offences last year and will be sentenced in March.