The clueless cluedo

For the third time, Henry made his way to Jack’s detective agency.
“Hello” Henry rolled a coin over. “I want to hire you.”
He duly explained.
The Davis family had moved over from America this summer and they had a prized possession. A Cluedo board: it was full of rare items, such as gold figurines, a 3D board and ornate cards
Yesterday, it was stolen.
When searching for clues, Ernie had told the police Henry stole the board.
“The liar, ” remarked Jack, “but what did he say?”
“He claims he saw a Cluedo board on my ice cream stand. He said he saw a very ornate word CLUEDO lettering on it.”
Jack rose from his chain.
“Case closed,” He said. “It’s obvious he lying.”
Why?
Because it’s called Clue in the US.