[3] Juliana Prosper (née Falcón) was born in Mar del Plata, Buenos Aires Province, Argentina, on 4 June 1976, and migrated to England, where she married Ray Prosper, with whom she had 4 children.
[4] At the time of the murders, she resided in an apartment off Wauluds Bank Drive with three of her children, including Nicholas.
A video uploaded by Prosper to Mega and shared on social media the day before the shooting shows him declaring himself to be a "follower" of Clementine, a fictional character from The Walking Dead videogame series, and showing contempt for his sister Gisele for a specific in-game choice several months prior, saying "her face will be mutilated further than necessary".
[5] Nicholas Prosper, 18, was arrested later that day around 600 meters from the crime scene.
[9] On 24 February 2025, Nicholas Prosper pleaded guilty to three counts of murder at Luton Crown Court, along with all other charges.