A idan Zellmer, 15, seemed just like any other teenage boy. He liked SpongeBob SquarePants, enjoyed superhero films like Deadpool.
And like many kids his age, his parents had split up - with Aidan and his brother staying with their mum.
Despite this, Aidan seemed to be coping well. With his baby face, he was known to be a sweet, good-natured boy.
Soon, Aidan’s mother Katie started dating Jacoby Campbell, who had a girl, Kiaya.
After a while, the two families moved in together in a house in Thornton, Colorado.
Aged 10, Kiaya was the baby of the house. And like many little girls, she loved singing and dancing, even having her own YouTube channel.
She was treasured by her family. So nothing could’ve prepared them for the tragedy that…
