The 18-year-old’s disruptions meant he was not in court as the judge handed him one of the longest minimum terms on record.
DCI Jason Pye, who led the investigation, said no training course could have prepared his officers for the horror of what they saw.
Here is a timeline of what was known when about Southport killer Axel Rudakubana: Axel Rudakubana becomes known to a range of local agencies due to anxiety, social isolation and challenging behaviour.