A vile dad who murdered his infant son and tried to kill his girlfriend has been jailed for life.
Denis Beytula stabbed three-week-old Andrei and attacked his partner Andreea Stefan at their house in Wallsend, North Tyneside, earlier this year.
Detective Inspector Graeme Dodds described the killer as the worst offender he had ever encountered in 20 years of policing.
Officers have been receiving support in the wake of attending the gruesome scene at the flat in October.
Police said the couple seemed happy from the outside, but in private, Beytula was controlling and abusive towards his partner.
They met at the end of 2018, and Andreea soon became pregnant, with little Andrei being born in September.
Baby Andrei died in hospital a week after the stabbing.
Dodds said: "Denis Beytula is a calculating, manipulative and controlling man, and that control escalated as the months drew on towards the birth Andrei."
Describing him as "jealous and selfish," Dodds went on: "He saw Andrei not as a son, in a loving fatherly way, he saw him as a rival for Andreea's affections.
"Because of that jealousy and selfishness, he killed Andrei and tried to kill Andreea."
Beytula, who worked in fast-food restaurants after coming to the UK seven years ago from Bulgaria, tried to claim that he had a mental illness, but psychiatrists found no evidence of any condition.
Police and other agencies were unaware of anything wrong with the couple's relationship because Andreea, who is Romanian, hadn't complained.
The couple spoke English with each other, but Beytula reacted furiously after heaving Andreea's mother speaking lovingly in Romanian to her grandson.
On the day of the murder, the pair had argued over a hairdresser, while previously, he had stopped his partner from going to London to collect an award she had won as a successful manager of a Domino's pizza branch.
He also tried to get her to find him a job in the same branch as her so he could keep watch.
Dodds praised the work of the emergency services who saved Andreea's life.
Describing Beytula, he said: "He is, without doubt, the worst offender I have ever encountered because of his propensity to commit that level of violence, not against any child but his own son, a three-week-old baby, who should have been in the safety and comfort of his own home.
"Through his own jealousy and selfishness, he killed his three-week-old baby and that makes him the most horrific individual I have ever encountered."
Andreea is reportedly recovering well from her life-threatening injuries.
Last week the mum spoke out, branding Beytula as "heartless" and saying she was "glad he'll pay for his actions".
Dodds praised her as "one of the strongest individuals I have come across.
"She is a very impressive young woman."
Commenting on the sentencing, an NSPCC spokeswoman said: "Beytula's priority should have been caring for his partner and their baby son, and protecting them from harm — but instead he subjected them to horrific violence with tragic consequences.
"Babies and young children are entirely reliant on those around them so we all have a duty to be alert to signs of abused and report any concerns we may have."
For more advice and support, call the NSPCC Helpline anonymously on 0808 800 5000 or via [email protected]