Unfortunately, there's not much known about the guy. Did a bit more digging and found that he was in his late-teens, early twenties.
He was always getting in trouble and his parents taking away his motorbike was a form of punishing him, so he eventually had enough of their shit and constructed this helmet.
How he did it was the kicker, he rigged the helmet to the light switch in the garage. So he sat on his bike, waited for his mother to come home, she saw him sitting on the bike and turned on the light to see what he was doing which then activated the helmet and her witnessing his head exploding.
On mobile now but will get direct quotes about the above later.
This helmet took time and planning, he probably hammered out a prototype at some stage and tested on melons or something to make sure the thing worked.
He was aiming for complete skull soup with the shells instantly stripping the brain to pulp, no pain for him.
Now that is hatred.
A real waste of genius, though.