St Bernard deputies say two teenagers, Michael Reidel and Brandon Ricouard, broke into a hobby store in Chalmette, stole money from its cash drawer, then set the place on fire.
The crime happened on Monday, and deputies say the pair also stole a memory card for a camera from the building.
That memory card may be a key piece of evidence in the case. Deputies say when they caught the pair, they were still in possession of the card which is said to contain photographs taken previously from inside the hobby store.
The two teens are also accused of burglarizing a car and trying to torch it. According to deputies, both have one prior arrest.