“Was his mother from a wealthy family? “
Astute investments starting at an early age can build up a pretty sizable bank account. Not all wealth is inherited.
Of course, he may have robbed a few banks himself. But that is only speculation.
Bet momma knows a lot and she handled the loot. ('cept Uncle Sam wants the taxes...like that will happen.)
Keep looking for a motive in my head. Did his one and only bud get killed via a Fast & Furious weapon? Is the gun among his cache?
——he may have robbed a few banks himself——
He was an internal auditor. I would guess he didn’t rob banks but coluded with the treasurer to embezzle
He had to have some money from somewhere to live in a $400,000 dollar home in Mesquite.
And to buy so many guns and ammo.
Maybe he wouldn't be considered "rich" but he had some bucks.