Prosper was a 'geeky' pupil who was socially awkwardpublished at 11:53 Greenwich Mean Time 18 March
We're now hearing more about Prosper's time at school, where he was described as a "geeky" boy who was into computers.
Cray says Prosper would complain when people tried to talk to him and "invade his personal space".
A teacher recalled how he showed "social awkwardness" and "lack of interest in interacting with others".
By February 2023, there were concerns about Prosper's mental health and in March that year, he dropped out of school and his A-level studies.
"Whilst unemployed his life seemed to revolve around going to the gym and spending time alone on his computers," Cray says.