Vickrum Digwa was jailed for life for stabbing 18-year-old Mr Nowak to death in Southampton on 3 December last year.
His mother, Kiran Kaur, arrived at the scene and removed the knife used by her son before police arrived.
Kaur was sentenced to three years in prison for assisting an offender in July, having taken the weapon back to the nearby family home.
Sky News understands that the release is set to take place in December, with Kaur, an Indian national, possibly being eligible for the government's deportation scheme.
The Home Office declined to comment on individual cases, but 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."
Kaur could serve less than half of her sentence, and be freed around the anniversary of Mr Nowak's death under the government's early release scheme.
She is also appealing against her punishment, with a hearing scheduled at the Court of Appeal on 5 November.
When her sentence was imposed, the 221 days she had already spent on remand were taken into account, it is understood.
More from Sky News:
Tiger attack wildlife park to reopen
Trump cancels livestreaming of execution
Arrests after four die in house fire
Some 5,000 prisoners are scheduled to be released in stages over the next year, down from 6,000 after ministers intervened to exempt rapists and the most serious child sex offenders.
Mr Nowak, a first-year finance student from Chafford Hundred, Essex, had been on a night out with his football team.
He was knifed five times by Digwa, suffering four stab wounds and a cut to his jaw, a post-mortem found.
But, despite his injuries, he was mistakenly arrested and handcuffed by police officers who believed Digwa's claim that Mr Nowak had racially abused him.
Hampshire Police later apologised for their officers' error.
Philip and Kim English were killed in the fire in Waterford shortly after 5am on Tuesday.
Two children, named Callum and Jayden, also died, while two more children with critical injuries were taken to hospital in Dublin.
On Thursday, police arrested a man in his 20s and a woman in her 30s over the incident.
Gardai said the duo were arrested on suspicion of facilitating a criminal organisation.
Police believe the blaze was started deliberately and have begun a murder investigation.
A post-mortem examination on Mr and Mrs English and the children has been completed but the results are not being released for "operational reasons".
Gardai have repeated their appeal for information on the suspected attack which took place on Birch Avenue, Birchwood.
On Thursday, Sinn Féin TD David Cullinane said the suspected attack showed "utter contempt for human life".
Multiple properties have been searched with a number of electronic devices and vehicles seized as part of an "intense" Garda investigation.
Hundreds attended a vigil on Wednesday in the Birchwood area.
A post-mortem examination found William Chapman, 24, died from multiple traumatic injuries after entering the enclosure of Amur tiger Altai at the park in Doncaster, South Yorkshire, on Saturday.
The park said in a statement: "Yorkshire Wildlife Park will reopen tomorrow (Friday) following the tragic incident that occurred at the park on Saturday.
"Our thoughts and heartfelt sympathies remain with the family, friends and loved ones of William Chapman who sadly lost his life.
"The safety and wellbeing of our visitors, staff team and animals remain our highest priority. We would like to thank all the people who have emailed, commented on our social media or contacted us with messages of support and love for our team at this time."
The park added: "Many people also contacted us about Altai, the tiger. We can reassure everyone that he is safe and well and will not be euthanised as a result of this incident."
Land Of The Tigers will reopen to visitors following engagement with the relevant authorities, the park said.
The park praised the "professionalism" of its staff ahead of the reopening.
"As we welcome visitors back, we would ask everyone to be understanding and respectful towards our staff team, who have shown tremendous professionalism and dedication during an exceptionally difficult time," the statement added.
"We are providing specialist trauma support and ongoing care for those affected. As enquiries remain ongoing, it would be inappropriate for us to comment further on circumstances at this time.
"We would like to thank everyone for their patience, understanding and support during this difficult period, and we look forward to welcoming visitors back to the Park."
More from Sky News:
Trump posts video of UK tiger attack
Man fatally attacked by tiger was visiting alone
An inquest into Mr Chapman's death, which opened on Thursday, heard that he had previously been diagnosed with schizophrenia and suffered bouts of psychosis.
His family had expressed concerns about his contact with mental health services before his death, Doncaster Coroner's Court was told.
The claim follows the discovery of a partial skeleton of a Neanderthal, our closest ancient relatives, in a cave in Iraq, including a left shoulder blade, some ribs, a nearly complete right hand and seven teeth.
The shoulder blade has a 1.5cm wound, suggestive of a deeply penetrating stab possibly from a forceful thrust by a sharpened wooden spear, a type of weapon Neanderthals are known to have used.
The individual, who has been named Shanidar A, was under about 25 feet (7.5m) of rocks and sediment inside the cave in the Zagros Mountains and dates to about 75,000 years ago.
Emma Pomeroy, a biological anthropologist from Cambridge University, lead author of the report, said the spear "would have gone through the skin and major muscles, especially the pectoralis, as well as the ribcage and muscles between the ribs, and the lung".
Ms Pomeroy said the location of the injury "could be like the kind of 'heart shot' hunters use to kill animals quickly by puncturing the heart".
Interpersonal violence, either from members of the same Neanderthal group or rival groups, is the likeliest explanation, University of Cambridge archaeologist Graeme Barker, who has led Shanidar Cave excavations since 2015, said.
Researchers, who placed Shanidar A's age in the mid-40s, were unable to determine their gender.
Shanidar A, who was one of five Neanderthals, four adults and one infant whose bodies were discovered in the cave, had survived a brutal injury at least a year before death.
Their teeth showed evidence of a blow to the face resulting in front teeth being smashed and lost. One tooth was split, with half remaining rotated in the mouth and others pushed out of position.
Ms Pomeroy said the pain "would have been extreme, and basic needs like eating and drinking would have been difficult, perhaps meaning Shanidar A needed food mashing and being able to rest.
"It's likely that Shanidar A did need some care from members of the group for some basic needs during recovery".
More from Sky News:
Tiger attack wildlife park to reopen
Trump cancels livestreaming of execution
Arrests after four die in house fire
Ms Pomeroy said the bones provide evidence "of two contrasting facets of human nature - care and violence - juxtaposed in the same individual.
"We see evidence all around us today that violence and care are both aspects of how we humans behave, and we see this here in Shanidar A, too.
"Neanderthals were like us in many respects, both the good and the bad, and this find really highlights that, going against stereotypes of Neanderthals as unintelligent, uncaring cavemen and cavewomen."
Neanderthals lived as hunter-gatherers and inhabited Eurasia from the Atlantic coast to the Ural Mountains from about 400,000 years ago until a bit after 40,000 years ago.
The updated instructions, published by NHS England on Thursday, mean hospitals should not assign trans women to female wards and trans men to male wards, with "alternative arrangements" to be made only if this was not "clinically appropriate".
Previously, trans patients could stay in a single-sex ward based on the gender with which they identified.
All patients "should be treated with respect, dignity, compassion and care", the report said, adding that "trans people and others with the protected characteristic of gender reassignment should be accommodated in line with their biological sex".
It adds that "where clinical needs and same-sex accommodation requirements cannot both be met, clinical needs are the priority".
The guidance acknowledged that cases where a trans patient was placed on a ward of their gender identity are likely to be "rare".
Acute, mental health and community NHS trusts, as well as NHS-funded patients in private settings, are impacted by the new advice, but A&E departments, urgent treatment centres or paediatrics are not.
NHS England staff working in hospitals and GP surgeries are told that single-sex facilities such as changing rooms and toilets should be used according to biological sex.
In trusts with mainly single-sex facilities, the advice is to think about whether alternatives, "such as single‑occupancy or mixed-sex facilities with individual lockable rooms can be provided to allow access to facilities in a way that respects privacy and dignity and supports inclusion of all staff".
The updated guidance comes just over two months after wider advice on single-sex spaces, written by Britain's rights watchdog, officially came into force, and 18 months since the Supreme Court ruling on biological sex.
The Equality and Human Rights Commission code had already confirmed that a service must be used on the basis of biological sex for it to be classed as single-sex under the Equality Act.
Nurse Bethany Hutchison, who led and won a claim against County Durham and Darlington NHS Foundation Trust after a trans colleague was allowed to use women's changing facilities, welcomed the "clear and necessary guidance from NHS England".
More from Sky News:
Tiger attack wildlife park to reopen
Trump cancels livestreaming of execution
Arrests after four die in house fire
She said: "The test now is whether NHS trusts will actually follow it."
Campaign groups TransActual and Trans+ Solidarity Alliance said in a joint statement that the guidance "leaves individual healthcare professionals unclear on how to safely look after trans patients".
The statement added: "Forcing trans people into spaces for our sex assigned at birth will never be the most clinically appropriate decision, and would push trans people away from accessing care."
Maya Forstater, chief executive of sex-based rights charity Sex Matters, called it "a momentous shift back to reality", but warned: "NHS patient data is a mess, with potentially thousands of trans-identifying people recorded as the opposite sex."