ANDREW and Julie Zagar want justice for their son Shaun and grandchildren Kaleb and Zara.

The family has already lost so much — a 28-year-old father of three and his two eldest children, aged 6 and 5, killed by habitual offender and drug addict Malcolm ­Joseph Harris as they waited for the school bus.

On Tuesday Harris was handed a sentence that could see him walk free in two years ­despite pleading guilty to driving under the influence of drugs, being ­unlicensed and driving with an epilepsy condition.

media_camera One of the last photos taken of Zara Zagar. media_camera One of the last photos taken of Kaleb Zagar.

Harris, 37, has a shocking traffic record dating back to 1994 and has repeatedly ­driven while unlicensed and under the influence. When he killed Shaun and the kids in June last year near Casino, he had a cocktail of diazepam, methadone and cannabinoids in his system at 8am.

Adding to the Zagars’ ­anguish, Harris was out on parole after being jailed for 18 months for unlicensed driving when he swerved off the road in his car and collided with the blue Mazda carrying Shaun and the children.

The night before the crash, Shaun had told his partner Felicity Grayson he had a ‘‘sick feeling in his gut’’. The Zagar family have called for an urgent appeal and ­locals are already backing a petition in support..

media_camera Grandparents Andrew and Julie Zagar / Picture: Jason O'Brien

Harris, charged with dangerous driving occasioning death and dangerous driving occasioning grievous bodily harm, is eligible for parole in 2016

The impact on the family left behind is immeasurable. Mrs Zagar said Harris’s sentence set the wrong standard for the community.

“There needs to be a stronger message sent to ­habitual offenders,” she said.

Kira Newbold, the mother of Kaleb and Zara, has ­expressed the raw emotions that Harris’s actions have forced her to endure.

media_camera Kaleb and Zara Zagar with their father Shaun / Picture: Supplied

‘‘I lost my first-born son the day before his 7th birthday. I lost my only daughter. I never thought that at 26 I’d ever have to see my first two children dead. No mother should ever have to see that,’’ Ms Newbold said.

‘‘The gut-wrenching feeling I get ... when I think I’ll never get to hear your laughter again, I’ll never get to see your smiles, never get to tell you I love you ever again.’’

The judge deemed the drugs in Harris’s system would not have impaired his driving.

‘‘Serious traffic offenders also need to be invited to meet people who have suffered a loss like ours to really understand the consequences of being an idiot,’’ Mr Zagar said.

media_camera Zara Zagar with her father, Shaun. They were killed near casino when a car slammed into their parked car.

The Daily Telegraph can reveal Attorney-General Brad Hazzard is looking into the matter following public outrage.

“The Attorney-General is aware of concerns about this case and has asked for a transcript of the sentencing remarks,” a spokeswoman said.

A spokeswoman for the Office of the Director of Public Prosecutions said “no decision has been made as yet” on whether it would proceed with an appeal against the light sentence.

The Zagar family will meet with prosecutors tomorrow.