I don't want to get into major details but I don't think that David Berg was dead in 1935. But the divorce decree between he and Mable says that as far as the state is concerned he is dead. Seriously. I'll have to find it. No fair I have that and you have the marriage certificate Jen.
No, I'm pretty sure he died within a year of their divorce. Gram would NEVER have lied. The wording of the decree that Uncle Willard wrote up said Mabel could resume her maiden name, etc "As if he (David Berg) was dead".