Juliana Prosper, 48, Giselle Prosper, 13, and Kyle Prosper, 16, were discovered at a flat in the northwest of the town.
An 18-year-old man has entered court on a charge of killing two youngsters and a mother in Luton.
On Friday, the remains of Juliana Prosper, 48, Giselle Prosper, 13, and Kyle Prosper, 16, were discovered at a flat in the northwest of the town.
Nicholas Prosper, who was wearing a grey sweatshirt, appeared at Luton magistrates court on Monday morning to verify his name and birthdate.
The court heard that Prosper was also accused of a number of other killing-related charges.
The court’s public gallery was full with family members, many of whom were tearful and shook their heads during Prosper’s short appearance in the dock. As he was led away from the dock, a man stood up to look him in the eye and said: “I still love you, son. I know it’s not your fault, OK.”
The deputy district judge Robert Borwick remanded Prosper into custody and ordered him to appear at Luton crown court for a preliminary hearing on 18 September.