That is a well written statement from the Thames Valley Police
'Throughout this investigation and trial, Blake has shown to be a character that lacks empathy and has lived life in fantasy, devoid of reality, with a complete lack of any remorse or compassion.'
When you read the court evidence this is someone who is unmoored, unhinged from everyday things, who has connected with what sounds like other equally disturbed individuals into this unreality. The recent Brianna Ghey murder is another example of what can happen when individuals retreat into a fantasy world (but its been seen many times before eg Parker-Hulme case).
Did Blake start off like this as an individual at 12? unlikely but the online milieu he seems to be in reminds me of the Aimee/Ashton Challenor situation, with a certain type of niche sexual content being shared between equally disturbed individuals, with individuals being so soaked in this that their values and sense of acceptability drifts very far from social norms. It makes me very doubtful that validation of the fantasy of being the opposite sex, reifying this unreality, and sense of disconnection is a good thing for the individual or society generally, and very very skeptical of the benefit of online 'supportive' communities that arise in these situations. Its also strange to think what a difference it made that he was in a situation where he could order anything at the click of a mouse to make these fantasies true eg cat trap, piano wire for homemade garotte - without engagement with other people.