When 17-year-old Axel Rudakubana got into a taxi on 29 July last year, it was the first time he'd left the family home on his own in more than two years.

His troubling behaviour and obsession with violence had brought him into contact with police, including counter-terrorism officers, the criminal justice system, social services, and mental health professionals over the previous five years.

His degree-educated, Christian parents, Alphonse Rudakubana and Laetitia Muzayire, were used to his violent outbursts , knew he had bought a small arsenal of weapons online, and had a history of carrying knives.

They thought he posed a threat to his father and older brother, but say they never thought he was capable of carrying out the mass stabbing at a Taylor Swift-themed dance class - kill

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