The boyfriends suicide is still under investigation.
Because of her past legal/financial problems, the only reason I don't believe her suicide is a sign she's guilty is that she's tried suicide a bunch of times before. I hope I'm right and she's not involved.
It's one thing for the poor kid to have to deal with, "My parents were addicts - my dad killed himself, and my mom killed herself a month later." IF it turns out she killed him for the insurance, then, when the authorities started to close in she killed herself - if I were the kid and those were my choices, I take the former over the latter and stay the f*ck away from drugs.