Well, considering how much of his local police department is in trouble one way or another, they may not be able to bring any evidence. And from all I understand, Marion was dead before he realized that she was anything more than asleep. Yes, she had a drugs history but she had been off the stuff for a while. The drugs she took were taken from a (?) locked cupboard: they had been prescribed for Bob's mother, who had herself recently died. Bob was seriously in love with the poor girl: not wisely, perhaps, but who falls in love wisely?
Yes, I may be unduly influenced by having heard Bob's side of the story. But I've known the guy for 17 years and I can't see him as guilty of anything as charged. Even Bob's ex-wife Darlene, divorced over Marion, is supporting him. Would she do that if she thought he was guilty?
If I were a betting man I'd take the $10 bet, but earning a living as a freelance is gamble enough for me: I don't think I've even played a slot machine in 25 years.
Cheers,
Roger (FoB -- Friend of Bob)