Department of Public Safety spokeswoman Toni Schwartz says Michael Hubbard reluctantly revealed to guards that his pet was inside his bag when X-ray screeners noticed something was moving inside.
Schwartz says there was also another contraband item inside the bag: a bottle of beer.
Screeners told Hubbard that the duck and beer wouldn't be able to go with him into Circuit Court for his appointment Monday. Hubbard left and then returned to ask the screeners to look after his belongings. He went inside, while his pet waited outside.
Hawaii News Now reports Hubbard has two felony assault cases pending. He couldn't be reached for comment Thursday.