[alloysteel]

“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.

[Sacajaweau]

We don't know that daddy's bank money was recovered. Once statute of limitations is past, its finders, keepers.

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?

[bert]

——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

[HotHunt]

This guy was an accountant. Doesn't seem unusual to accumulate some wealth by knowing how not to waste your money, like many people do.

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.