An evil dad killed his own four kids using a pillow and a knife to get ‘revenge’ on their mum.

The bodies of the victims – aged three, six, eight, and 11 – were found in the suspect’s home in Alvorada, southern Brazil, on Tuesday, 13th December.

David da Silva Lemos, 28, was arrested in a hotel in neighbouring Porto Alegre early the next day.

Harrowingly, he told police he had plied the children with a ‘tea’ to pacify them, before suffocating them with a pillow and stabbing them with a knife.

He was taken to the police station, where he then exercised his right to remain silent.

The victims’ maternal grandmother believes he killed the youngsters to get ‘revenge’ on their mother, from whom he had recently split.

Idenise Martins da Silva told local media: “He had already attacked my daughter.

“Their relationship had ended for good, but he did it to get to my daughter – I’m sure of it – in the worst way possible. He is a coward.”

Police say the couple had been together for 12 years but separated after Lemos assaulted his partner in September.

The 24-year-old victim had reported the incident to police and taken out a restraining order against him.

Relatives said that at the time of the killings, the children had been staying with their father and had been due to go back to their mother in the coming days.

Police said Lemos had sent his ex-partner threatening messages shortly before the time the killings are believed to have been carried out.

Despite his history of domestic violence, it is believed to be his first incident of violence towards his children.

The victims have been named as – from youngest to eldest – Kimberlly, Giovanna, Donavan, and Yasmin Antunes Lemos.