Vickrum Digwa was jailed for life for stabbing 18-year-old Mr Nowak to death in Southampton in December.
His mother, Kiran Kaur, arrived at the scene and removed the knife used by her son before police arrived.
Kaur, 53, of St Denys Road, Southampton, was jailed for three years for assisting an offender in July.
Sky News understands that the release is set to take place in December.
A government spokesperson said: “Our thoughts remain with the family and friends of Henry Nowak, whose life was cruelly cut short in a horrific act of violence.
“We will always seek to deport foreign criminals at the first opportunity.”
Mr Nowak, a first-year finance student from Chafford Hundred, Essex, had been on a night out with his football team.
He was stabbed five times by Digwa but was mistakenly arrested and handcuffed by police officers who believed Digwa’s claim that Nowak had racially abused him.
He fell unconscious and died from a fatal stab wound to his heart as officers tried to give first aid.
In the lead up to the attack, Digwa was filmed by his victim telling him “I am a bad man” moments before the knife attack.
On the night of the murder, Digwa was wearing “an extremely large knife in a sheath openly displayed over his clothing” – an 8in (21cm) shastar, the Punjabi word for weapon or knife – as well as a smaller kirpan around his neck and under clothing.
Digwa told the court that Mr Nowak, whom he described as drunk, had racially abused him before punching him and knocking his turban off.
Mr Nowak suffered four stab wounds and a cut to his jaw, with two of the wounds to the back of his legs, a post-mortem examination found.
This breaking news story is being updated and more details will be published shortly.
Please refresh the page for the fullest version.
You can receive breaking news alerts on a smartphone or tablet via the Sky News app. You can also follow us on WhatsApp and subscribe to our YouTube channel to keep up with the latest news.
