When Professor Layton asks about Tom's disappearance, Capone and his wife try to help out. He might seem like an unhelpful old man as Luke said, he apparently saw a boy, but his wife says 'it' really looked more like a girl. But Layton said that they were helpful, because they helped him figure out that Tom was a dog and that the girl in disguise was Flora.
There's something childlike and scattered about Capone, as is illustrated by the bewildering things he says to Layton and Luke when Tom disappears. As unbelievable as is sounds, Capone is actually a CEO of a big corporation.