Mr Turetta, 22, can be seen beating his former partner in a car park close to her house in Vigonovo, near Venice - according to the investigating judge.

“He was a normal boy, practically perfect,” his father Nicola Turetta said in an interview with Italian newspaper La Repubblica.

“He did well in school, he never had any problems with teachers or classmates. He never got into arguments with anybody.”

Ms Cecchettin’s sister Elena said she had been concerned about his possessiveness, but never imagined he could hurt her.

She pointed to a patriarchal culture of violence and control over women that normalises men’s dangerous behaviour.

“Filippo is often described as a monster, but he’s not a monster,” Elena told Italian media. "A monster is an exception, a person who’s outside society, a person for whom society doesn’t need to take responsibility.

“Monsters are healthy sons of the patriarchy and rape culture,” she added.