This is the moment a cruel woman threatens her lesbian lover’s son while he is chained up in a wardrobe, telling him she will “take him apart” and “rub his piss in his face”.

Seven-year-old Miguel was later allegedly killed by his own mother, Yasmin Vaz dos Santos Rodrigues, shortly after the video was filmed, with the shocking story of how he was chained in the cupboard making international headlines.

The mother reportedly confessed to the police to drugging her son and dumping his body in a river on 29th July.

Her girlfriend, Bruna Nathieli Porto da Rosa, who made the video, is suspected of involvement in the boy’s presumed death, and she is currently being held in preventive custody.

It was the two women who raised the alarm themselves when they went to the police station in the Brazilian municipality of Imbe, telling officers Miguel had gone missing.

Police chief Antonio Ractz said: “They claimed at the time he had disappeared over 48 hours beforehand, which raised suspicion on the part of the police.”

Yasmin ended up confessing to beating her son and keeping him chained up inside a wardrobe. She said that after beating him on 28th July, she gave him an anti-depressant medication.

Ractz said: “She claimed she would have given him just half a pill. However, her partner said two packs of the medicine were missing.”

Yasmin told the police that her son woke up screaming and moaning the next day. However, she did not seek medical help because he was bruised from the beating she had given him, and she did not want to be found out.

A short while later, Miguel’s fingertips and lips had turned purple, his pulse had vanished, and his body had gone cold.

Yasmin did not think her son was yet dead, so she loaded his body into a suitcase on wheels, which she took to the nearby Tramandai River. She then threw his body into the river to finish him off.

The police searched Yasmin’s flat, where they found a notebook in which Miguel had been forced to write self-deprecating phrases over and over again as a punishment.

An extract read: “I’m an idiot. I don’t deserve the mum I have. I’m a criminal. I’m bad. I’m cruel. I’m evil. I suck. I don’t know how to value anyone. I’m a horrible son.”

Two padlocks and the chain used to lock Miguel inside the wardrobe were also seized, as was Bruna’s mobile phone, on which the incriminating video of her threatening the youngster was found.

Bruna has been sent for a psychological and psychiatric evaluation at the behest of her lawyer, Luiz Paulo Cardoso, who is trying to get his client off the hook by claiming she is not of sound of mind.

Yasmin has also protested her innocence.

Police chief Ractz said: “I will indict both of them. They will be indicted for torture, doubly-qualified murder, and concealment of a corpse.”

Miguel’s body has still not been found.