The family of murdered schoolgirl Megan Leigh-Peat issued a statement read by police outside Luton Crown Court.
Andrew Hall - a former scholar at Stoke City's football academy - was found guilty of her murder. He will serve a minimum of ten years in prison.
Hall stabbed Megan 60 times with two different knives following an argument about his jealousy.
More top news
A man has been jailed for 16 years for repeatedly stabbing his partner before turning on her 13-year old son, who came to his mother's aid.
Staffordshire County Council discovered the rare minute-by-minute witness account.
At it's height 23 firefighters were called out to tackle the fire.