I've seen court documents that place Girolamo D'Anna in Michigan since at least 1984. I'm not sure of his brother Giuseppe. For sure they've both been here since the early 90's. I'm certain they are citizens, however I'm not sure if they hold dual citizenship. Considering the amount of time they spend in Sicily, I wouldn't doubt it.

Also regarding their ties to "proper organized crime activities", the upcoming Federal trial focusing on the brothers will show their activity in organized crime in Michigan and Sicily in great detail.