lynn roy: i closed my eyes, and i said, this is not real.s death and only encouraged it? did you just feel like you'd been duped? she's been consoling you this whole time. i'm a very forgiving person. and the only thing i can say about the ways that she was with me is that she's just really, really not well. andrea canning: the grand jury indicted michelle for involuntary manslaughter. she pleaded not guilty. that's when the world heard the story for the first time, and the debate began. was conrad's death a suicide or a homicide? coming up, a jaw-dropping theory about motive. why would she do this? she wanted the attention. andrea canning: and at trial, michelle makes a stunning decision. judge moniz: are you doing that only and voluntarily? yes. andrea canning: is it a choice she'll regret? when "dateline" continues. ♪♪ stay ahead of your moderate-to-severe eczema. and show off clearer skin and less itch with dupixent, the #1 prescribed biologic by dermatologists and allergists, that helps heal your skin from within. serious allergic react