Watch dramatic arrest of man who repeatedly stabbed girl, 9, after researching Southport murders / Man researched Southport killings before stabbing nine-year-old girl / Public inquiry into Southport murders begins / Southport murders inquiry launched to uncover horrors behind Axel Rudakubana's attack / Two-phase public inquiry into Southport murders formally launched / Keir Starmer 'could have prejudiced Southport murder trial outcome' by 'suppressing facts' / Luton murderer's internet history paints troubling picture: Here's what we know about Nicholas Prosper who killed family / Southport killer's sentence will not be reviewed / No, the Southport killer's motive is not 'difficult to comprehend'. It's called misogyny | Yvonne Roberts / Programme that missed Southport murderer also closed case on MP's killer 'too quickly'