On the general point raised by the OP - I agree that there might be legal reasons for the language used - I was reminded of a campaign in Ireland in the wake of the murder of Clodagh Coll [Hawe] and her three children – Liam, 14, Niall, 11, and Ryan, 6 – who were murdered by Alan Hawe, the husband/father, in Co Cavan in August 2016.
The shocking event was presented as a tragedy - the poor family, that poor man, well known and well respected in the community, what could have driven him to do such a thing, killing his own little boys... and so on.
There was campaign to remind people that a woman, a mother, a wife had been murdered too, it was called 'Her Name Was Clodagh'
The Alan Hawe murders followed a pattern where the perpetrators of familicides like this were treated as victims - I remember a case in 2013 of a man who murdered his 3 year old daughter before killing himself - a radio presenter wondered 'what must have been going through that poor man's mind in the moments before he drowned his daughter'.
In fact he had carefully planned to kill his daughter so her mother wouldn't have custody of her after they divorced.
At his funeral a member of his family asked mourners to remember Martin as a kind, compassionate and helpful neighbour and the coffin was carried shoulder-high through the town to the graveyard.
The mother of the little girl was completely sidelined in reports, and I think there was even some animosity towards her locally, as the murderer's friends defended him as someone who would never hurt a fly...
The little girl was buried with her murderer, and the mother had to fight for years to have her exhumed and reburied near her mother's home.
I think since the Her Name Was Clodagh campaign, there's more balance in reporting now, and I don't think the media here would be so partial towards the perpetrator any more.