There's no word yet who that is or if they'll be charged.
Investigators say they've also impounded a white van seen in the subdivision in the days before the November 10th blast that leveled several homes and killed two people, Dion Longworth, a Henderson native, and his wife Jennifer.
It was just changed to a homicide investigation Monday.
A $1,000 reward is being offered for information that leads to an arrest.
Federal authorities are offering an additional $10,000 reward.