A 19-year-old man who killed his mother and two siblings was also planning to attack a school, it can now be reported.
Nicholas Prosper pleaded guilty to the murders of Juliana Falcon, 48, Giselle Prosper, 13, and Kyle Prosper, 16, at Luton Crown Court on Monday.
Their bodies were found at a flat in Leabank, off Wauluds Bank Drive, on September 13 last year.
After the murders, Prosper was stopped by officers from Bedfordshire Police in nearby Bramingham Road, and a loaded shotgun was found hidden in bushes nearby, along with more than 30 cartridges.
They later discovered that he had been plotting to attack a local school.
