The bill would also include a proposal to introduce a discretionary life sentence for offenders with a previous conviction for a similar offence.
However, there is no timescale for when the law will change, beyond an intention to introduce legislation before the next Northern Ireland Assembly election in 2027.
Enda’s father, Peter Dolan, told BBC News NI it was taking too long to introduce tougher sentences.
The law in England, Wales and Scotland changed in 2022 with the maximum penalty increased to a life sentence.
Mr Dolan said the justice system in Northern Ireland was “not fair” and needed to change.
“In England and Wales the maximum there is life for a similar crime. So why are we backward here? Why does it take forever? Why are we always behind?” he said.
“Like everything in Northern Ireland it takes forever and you’re sort of wondering, listen we’re 10 years shouting about this.
“Can we not get this over the line?”
Mr Dolan believes “it should be life for committing such a horrendous crime” and tougher sentences would be a “major deterrent” for people who drive under the influence of drink or drugs.
A change in the law would be “a great achievement but I think it needs to happen sooner rather than later”, he said.
“Things are not going to change for us, you know, it’s not going to change anything,” Mr Dolan said.
“Enda’s not going to come home and say right, okay, I’m back. That’s not happening.
“It’s just one of those things. I think we would rest happier.”
