"Police executed a search warrant at the defendant's address and the victim's keys were located inside of a backpack belonging to the defendant," police prosecutor Graham Hoskin told the Whanganui District Court.
"The defendant had no authority to enter the bus or take the victim's backpack. The other property in the backpack was valued at $830 and was not recovered."
Llewellyn-Thomas pleaded guilty to theft ex-car through duty solicitor Ollie Crosse, who said that the defendant acknowledged that what he did was wrong.
"He's accepted responsibility for this. I'm instructed he was homeless and cold at the time," Crosse said.
"I'm also instructed that he wasn't on medication for his ADHD."
Judge Dugald Matheson sentenced Llewellyn-Thomas to two months' imprisonment.
"The bus driver was most distressed by this and I can understand why," Judge Matheson said.
"As a result of your theft, Tranzit's out of pocket to the extent of $515. [The victim] is out of pocket to the extent of $310.12 and AMI's out of pocket to the extent of $924.46.
"They should not be out of pocket."
The Judge ordered Llewellyn-Thomas to pay all of the sums in reparation.