GoKawiilLucas was 16 when he got into trouble for hacking his school computers. Twice.
"It was like a challenge to see if I could," he told the BBC.
He wanted access to play games and visit blocked websites so he started tinkering with programming.
At one point he even unscrewed the computer tower to take some internal components home for tests.
"It's quite a sense of achievement when you've succeeded in doing something that two or three trained professionals have spent a lot of time trying to stop you doing," he said.
He was close to being expelled - but his worried mother had no idea how serious his actions were.
She called the police and invited an officer from the nationwide programme Cyber Choices to their home in rural Cumbria.
"My mum was like, 'ooh, you've got a detective coming to speak to you, you're in a lot of trouble'," Lucas said.
"So I was sat at the window waiting. Who's going to come? How much trouble am I going to be in?"
PC Sam Cooper knocked on the door earlier this year and has been working with Lucas ever since.