Mr Moss said on the morning of 22 July 2024, Rudakubana had asked his father when The Range school broke up for the summer half term.
Mr Rudakubana later told police he checked his phone and told his son it was the final day of term that day, adding: "They will be going off to university now."
He said his son replied: "Well I won't be, will I?"
Mr Moss said at 12:45 BST, a taxi arrived at the then Rudakubana family home on Old School Lane in Banks, west Lancashire.
The teenager emerged wearing the same green hoodie - with the hood up - and Covid-style face mask that he would go on to wear a week later in his attack on the dance studio, and was carrying a backpack.
The driver reported that the boy's father then rushed out of the front door and began "pleading" for him not to take his son.
The teenager then said "I am 18, take me", the inquiry heard.
The driver said he did not want to "get in the middle of a domestic" and asked Rudakubana to get out, before accepting £5 from his father for his trouble.
That incident was not reported until after the murders, when Mr Rudakubana told police he suspected his son had a knife in the backpack at the time.
The inquiry previously heard Mr Rudakbana told police in 2023 he intercepted a machete his son had ordered online and "hid it on top of a wardrobe".
[SRC] https://www.bbc.co.uk/news/articles/c33rpyvvnn8o
