The hearing also heard statements from Keaton's brothers, Kai and Josh.

"Losing Keaton has left a space in my heart that can never be filled," Kai said.

"Keaton's death didn't just take away my little brother - I'll never get to see the man he would be.

"Knowing that someone could leave the scene after what happened, I will never understand."

Josh, Keaton's half brother, said he "struggled to comprehend" what happened and was angry Keaton had been taken away.

"The defendant has left a trail of destruction that cannot be repaired and will be with us forever," he said.

Owatemi sat in court with the family, and speaking after the sentencing, she said: "Today has been the most heartbreaking day I have experienced as a Member of Parliament."

She added: "As a mother, I cannot begin to imagine receiving the phone call that tells you your child is never coming home.

"I cannot imagine the pain of losing your son so suddenly, knowing that his life has been taken because of someone else's actions."

She also said she was "incredibly angry" at the sentence handed down.

"I do not believe this sentence reflects the seriousness of what happened to Keaton, or the suffering his loved ones have been forced to endure," she said.

Owatemi said she struggled to understand how Keaton's parents "are expected to accept this as justice".

She said she would support the family in an attempt to get the sentence reviewed by the Court of Appeal.